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INTRODUCTION:
ALBERT EINSTEIN ONCE SAID:
“COMPOUND INTEREST IS THE EIGHTH WONDER OF THE WORLD. HE, WHO UNDERSTANDS IT, EARNS IT; HE WHO DOESN’T, PAYS IT.”
COMPOUNDING IS A POWERFUL FINANCIAL CONCEPT THAT HELPS YOUR MONEY GROWS FASTER OVER TIME. IN THIS ARTICLE, WE EXPLAIN THE DIFFERENCE BETWEEN SIMPLE INTEREST (SI) AND COMPOUND INTEREST (CI), THEIR FORMULAS AND HOW TO CALCULATE THEM WHEN INTEREST IS COMPOUNDED MONTHLY, QUARTERLY, HALF-YEARLY OR BIMONTHLY — ALL WITH REAL EXAMPLES.
WHAT IS SIMPLE INTEREST (SI)?
SIMPLE INTEREST IS CALCULATED ON THE ORIGINAL PRINCIPAL AMOUNT FOR THE ENTIRE INVESTMENT PERIOD.
SI FORMULA:
SI=P×R×T/100
WHERE:
P = PRINCIPAL
R = RATE OF INTEREST (PER ANNUM)
T = TIME IN YEARS
EXAMPLE (SIMPLE INTEREST):
IF YOU INVEST ₹10,000 AT 10% ANNUAL INTEREST FOR 2 YEARS:
SI=10000×10×2/100=₹2000
TOTAL AMOUNT = ₹10,000 + ₹2000 = ₹12,000
WHAT IS COMPOUND INTEREST (CI)?
COMPOUND INTEREST MEANS INTEREST ON INTEREST. UNLIKE SI, THE INTEREST IS ADDED TO THE PRINCIPAL AND FUTURE INTEREST IS CALCULATED ON THIS UPDATED AMOUNT.
GENERAL CI FORMULA:-
A = P ( 1 + R / (n x 100))n x T
CI = A – P
WHERE:
A = FINAL AMOUNT
P = PRINCIPAL
R = ANNUAL INTEREST RATE
T = TIME IN YEARS
n = NUMBER OF TIMES INTEREST COMPOUNDED PER YEAR
COMPOUNDING FREQUENCIES AND FORMULAS
| FREQUENCY | VALUE OF N | FORMULA FOR CI |
| ANNUALLY | 1 | A = P ( 1 + R / 100)T |
| HALF-YEARLY | 2 | A = P ( 1 + R / (2 x 100)) 2 x T |
| QUARTERLY | 4 | A = P ( 1 + R / (4 x 100)) 4 x T |
| BIMONTHLY | 6 | A = P ( 1 + R / (6 x 100)) 6 x T |
| MONTHLY | 12 | A = P ( 1 + R / (12 x 100)) 12 x T |
REAL-LIFE EXAMPLE (COMPOUND INTEREST ON ₹10,000 FOR 1 YEAR AT 12% RATE)
LET’S CALCULATE THE FINAL AMOUNT WITH DIFFERENT COMPOUNDING FREQUENCIES.
| COMPOUNDING FREQUENCY | FORMULA USED | FINAL AMOUNT (₹) | CI EARNED (₹) |
| ANNUALLY | 10000 (1 + 12/100)1 | ₹11,200 | ₹1,200 |
| HALF-YEARLY | 10000 (1 + 6/100)2 | ₹11,236 | ₹1,236 |
| QUARTERLY | 10000 (1 + 3/100)4 | ₹11,255.09 | ₹1,255.09 |
| BIMONTHLY | 10000 (1 + 2/100)6 | ₹11,266.82 | ₹1,266.82 |
| MONTHLY | 10000 (1 + 1/100)12 | ₹11,268.25 | ₹1,268.25 |
CONCLUSION:-
MORE FREQUENT COMPOUNDING = HIGHER RETURNS OVER TIME!
KEY TAKEAWAYS
SIMPLE INTEREST GROWS IN A STRAIGHT LINE.
COMPOUND INTEREST GROWS EXPONENTIALLY.
MONTHLY OR FREQUENT COMPOUNDING EARNS MORE.
THE EARLIER YOU START, THE BIGGER YOUR GAINS.
USE CI FOR LONG-TERM INVESTMENTS LIKE SIPS, FDS, AND RETIREMENT FUNDS.
RULE OF 72: THE SHORTCUT TO DOUBLING YOUR MONEY
THE RULE OF 72 IS A SIMPLE FORMULA USED TO ESTIMATE THE NUMBERS OF YEARS IT TAKES FOR AN INVESTMENT TO DOUBLE IN VALUE AT AFFIXED ANNUAL RATE OF INTEREST TO FIND OUT THE RATE NEEDED TO DOUBLE IN A GIVEN TIME.
THIS RULE IS POPULARLY USED IN FINANCE, BANKING AND COMPETITIVE EXAMS FOR QUIXK MENTAL CALCULATIONS INVOLVING COMPOUND INTEREST AND INVESTMENT GROWTH.
RULE OF RULE 72 FORMULAE:
TO CALCULATE TIME TO DOUBLE
TIME (YEARS) =72 / INTEREST RATE (% PER ANNUM)
TO CALCULATE RATE OF RETURN
INTEREST RATE (% PER ANNUM) = 72 / TIME (YEARS)
EXAMPLES:-
DOUBLING TIME:
IF YOUR INVESTMENT EARNS 8% ANNUAL RETURN THEN:
TIME = 72 / 9 = 8 YEARS
REQUIRED RATE:-
IF YOUR MONEY WANT TO DOUBLE IN 6 YEARS, THEN
RATE = 72 / 6 =12%
LIMITATIONS:-
IT`S AN APPROXIMATIONS, NOT EXACT MATH.
BEST FOR INTEREST RATE BETWEEN 6% AND 10%.
FOR HIGH RATES (ABOVE 15%), RESULTS MAY VARY.
1. SSC CGL 2021
Q. WHAT IS THE SIMPLE INTEREST ON ₹6000 AT 5% PER ANNUM FOR 4 YEARS?
SOLUTION:
SI = (P × R × T)/100 = (6000 × 5 × 4)/100 = ₹1200
ANSWER: ₹1200
2. IBPS PO 2022
Q. THE COMPOUND INTEREST ON ₹8000 AT 10% P.A. FOR 2 YEARS IS?
SOLUTION:
A = 8000(1 + 10/100)² = 8000 × 1.21 = ₹9680
CI = ₹9680 − ₹8000 = ₹1680
ANSWER: ₹1680
3. SSC CHSL 2020
Q. IF THE SIMPLE INTEREST ON A CERTAIN SUM FOR 2 YEARS AT 7% P.A. IS ₹560, WHAT IS THE PRINCIPAL?
SOLUTION:
P = SI × 100 / (R × T) = 560 × 100 / (7 × 2) = ₹4000
ANSWER: ₹4000
4. RRB NTPC 2019
Q. WHAT IS THE AMOUNT ON ₹5000 COMPOUNDED ANNUALLY AT 8% FOR 2 YEARS?
SOLUTION:
A = 5000(1 + 8/100)² = 5000 × 1.1664 = ₹5832
ANSWER: ₹5832
5. NDA 2021
Q. IN HOW MANY YEARS WILL ₹2500 BECOME ₹3000 AT 4% SIMPLE INTEREST?
SOLUTION:
SI = ₹500, P = ₹2500, R = 4%
T = SI × 100 / (P × R) = 500 × 100 / (2500 × 4) = 5 YEARS
ANSWER: 5 YEARS
6. CDS 2022
Q. A SUM OF MONEY BECOMES ₹11236 IN 2 YEARS COMPOUNDED ANNUALLY AT 6%. FIND THE PRINCIPAL.
SOLUTION:
A = P(1 + R/100)²
11236 = P(1.06)² = P × 1.1236
P = 11236 / 1.1236 = ₹10,000
ANSWER: ₹10,000
7. UPSC CSAT 2023
Q. IF ₹6400 AMOUNTS TO ₹7290 IN 2 YEARS COMPOUNDED ANNUALLY, WHAT IS THE RATE?
SOLUTION:
A = P(1 + R/100)²
7290 = 6400(1 + R/100)²
(1 + R/100)² = 7290/6400 = 1.140625 → √ = 1.0675
R = 6.75%
✅ANSWER: 6.75%
8. IBPS CLERK 2020
Q. WHAT IS THE DIFFERENCE BETWEEN CI AND SI ON ₹12000 AT 10% FOR 2 YEARS?
SOLUTION:
CI = 12000(1.10)² − 12000 = ₹2520
SI = 12000 × 10 × 2 / 100 = ₹2400
DIFFERENCE = ₹120
ANSWER: ₹120
9. RAILWAY ALP 2018
Q. A SUM DOUBLES IN 8 YEARS AT SIMPLE INTEREST. WHAT IS THE RATE?
SOLUTION:
IF SI = P, THEN SI = P × R × T / 100 →
P = P × R × 8 / 100 → R = 100/8 = 12.5%
ANSWER: 12.5%
10. SSC CGL 2019
Q. FIND COMPOUND INTEREST ON ₹2000 AT 5% COMPOUNDED HALF-YEARLY FOR 1 YEAR.
SOLUTION:
N = 2, R = 2.5%, T = 1
A = 2000(1 + 2.5/100)² = 2000 × (1.025)² = ₹2101.25
CI = ₹101.25
ANSWER: ₹101.25
11. SBI CLERK 2021
Q. SI ON ₹15000 FOR 3 YEARS IS ₹5400. FIND THE RATE.
SOLUTION:
R = SI × 100 / (P × T) = 5400 × 100 / (15000 × 3) = 12%
ANSWER: 12%
12. RRB GROUP D 2019
Q. FIND CI ON ₹10000 FOR 2 YEARS AT 8% COMPOUNDED YEARLY.
SOLUTION:
A = 10000 × 1.08² = ₹11664 → CI = ₹1664
✅ANSWER: ₹1664
13. SSC CGL TIER II 2020
Q. WHAT WILL ₹6400 AMOUNT TO IN 3 YEARS AT 5% SI?
SOLUTION:
SI = (6400 × 5 × 3)/100 = ₹960 → AMOUNT = ₹7360
ANSWER: ₹7360
14. IBPS PO 2018
Q. CI ON ₹4000 FOR 2 YEARS AT 10% COMPOUNDED YEARLY?
SOLUTION:
A = 4000 × 1.1² = ₹4840 → CI = ₹840
ANSWER: ₹840
15. UPSC CDS 2017
Q. A MAN GETS ₹220 AS SI IN 2 YEARS AT 5%. WHAT IS THE PRINCIPAL?
SOLUTION:
P = SI × 100 / (R × T) = 220 × 100 / (5 × 2) = ₹2200
ANSWER: ₹2200
16. SSC MTS 2021
Q. ₹3000 GIVES ₹540 AS SI IN 3 YEARS. FIND THE RATE.
SOLUTION:
R = (540 × 100) / (3000 × 3) = 6%
ANSWER: 6%
17. RRB JE 2019
Q. CI ON ₹5000 AT 4% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × (1.04)² = ₹5408 → CI = ₹408
ANSWER: ₹408
18. SSC GD 2020
Q. DIFFERENCE BETWEEN CI AND SI FOR ₹8000 AT 5% FOR 2 YEARS?
SOLUTION:
CI = 8000 × 1.1025 − 8000 = ₹820
SI = 8000 × 5 × 2 / 100 = ₹800
DIFFERENCE = ₹20
ANSWER: ₹20
19. NDA 2018
Q. A SUM OF ₹6000 EARNS ₹1080 IN 3 YEARS SI. FIND THE RATE.
SOLUTION:
R = (1080 × 100) / (6000 × 3) = 6%
ANSWER: 6%
20. SBI PO PRELIMS 2020
Q. WHAT IS THE CI ON ₹2500 FOR 2 YEARS AT 12% COMPOUNDED ANNUALLY?
SOLUTION:
A = 2500 × 1.2544 = ₹3136 → CI = ₹636
ANSWER: ₹636
21. SSC CGL 2020
Q. A SUM BECOMES ₹8820 IN 2 YEARS AT COMPOUND INTEREST AT 10% P.A. WHAT IS THE PRINCIPAL?
SOLUTION:
A = P(1 + 10/100)² = P × 1.21
P = 8820 / 1.21 = ₹7297.52
ANSWER: ₹7297.52
22. IBPS PO 2020
Q. WHAT WILL BE THE COMPOUND INTEREST ON ₹12000 FOR 2 YEARS AT 12.5% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 12000 × (1 + 12.5/100)² = 12000 × 1.265625 = ₹15187.50
CI = ₹15187.50 − ₹12000 = ₹3187.50
ANSWER: ₹3187.50
23. RRB ALP 2018
Q. FIND THE SI ON ₹4000 AT 9% P.A. FOR 3 YEARS.
SOLUTION:
SI = (4000 × 9 × 3)/100 = ₹1080
ANSWER: ₹1080
24. SSC CHSL 2021
Q. WHAT IS THE COMPOUND INTEREST ON ₹10,000 AT 8% P.A. FOR 3 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 10000 × (1.08)³ = 10000 × 1.259712 = ₹12597.12
CI = ₹2597.12
ANSWER: ₹2597.12
25. IBPS CLERK 2019
Q. IN HOW MANY YEARS WILL ₹6000 AMOUNT TO ₹7200 AT 10% SI P.A.?
SOLUTION:
SI = 7200 − 6000 = ₹1200
T = (1200 × 100)/(6000 × 10) = 2 YEARS
ANSWER: 2 YEARS
26. SSC GD 2019
Q. FIND THE DIFFERENCE BETWEEN CI AND SI ON ₹5000 FOR 2 YEARS AT 6%.
SOLUTION:
CI = 5000 × (1.06)² = 5000 × 1.1236 = ₹5618
SI = 5000 × 6 × 2 / 100 = ₹600
CI − SI = ₹5618 − ₹5600 = ₹18
ANSWER: ₹18
27. NDA 2022
Q. ₹8000 IS LENT AT 5% P.A. COMPOUND INTEREST. WHAT WILL BE THE AMOUNT AFTER 2 YEARS?
SOLUTION:
A = 8000 × 1.1025 = ₹8820
ANSWER: ₹8820
28. UPSC CSAT 2021
Q. WHAT IS THE SI ON ₹2000 FOR 3 YEARS AT 7.5% P.A.?
SOLUTION:
SI = (2000 × 7.5 × 3)/100 = ₹450
ANSWER: ₹450
29. SSC CGL TIER 2 2019
Q. A MAN DEPOSITED ₹10,000 IN A BANK OFFERING 5% CI HALF-YEARLY. WHAT WILL BE THE AMOUNT AFTER 1 YEAR?
SOLUTION:
N = 2, R = 2.5% PER HALF-YEAR
A = 10000 × (1.025)² = ₹1050.625 → ₹10506.25
ANSWER: ₹10506.25
30. IBPS SO 2019
Q. A SUM DOUBLES IN 10 YEARS AT CI. FIND THE RATE (COMPOUNDED ANNUALLY).
SOLUTION:
2P = P(1 + R/100)¹⁰ → (1 + R/100) = 2^(1/10) ≈ 1.0718
R ≈ 7.18%
ANSWER: 7.18%
31. RRB NTPC 2020
Q. FIND CI ON ₹4000 AT 5% P.A. FOR 2 YEARS COMPOUNDED YEARLY.
SOLUTION:
A = 4000 × 1.1025 = ₹4410
CI = ₹410
ANSWER: ₹410
32. SSC JE 2018
Q. A MAN INVESTED ₹5000 FOR 2 YEARS AT 10% P.A. COMPOUNDED ANNUALLY. WHAT IS THE AMOUNT?
SOLUTION:
A = 5000 × 1.21 = ₹6050
ANSWER: ₹6050
33. SBI PO 2021
Q. FIND SI ON ₹6000 FOR 3 YEARS AT 8% P.A.
SOLUTION:
SI = (6000 × 8 × 3)/100 = ₹1440
ANSWER: ₹1440
34. SSC MTS 2022
Q. ₹9000 BECOMES ₹10206 IN 2 YEARS AT COMPOUND INTEREST. FIND THE RATE.
SOLUTION:
10206 = 9000 × (1 + R/100)²
(1 + R/100)² = 1.134 → √ = 1.064
R ≈ 6.4%
ANSWER: 6.4%
35. NDA 2020
Q. WHAT WILL ₹2500 BECOME IN 3 YEARS AT 4% SI?
SOLUTION:
SI = (2500 × 4 × 3)/100 = ₹300 → AMOUNT = ₹2800
ANSWER: ₹2800
36. IBPS CLERK 2021
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT 10% CI. FIND THE PRINCIPAL.
SOLUTION:
P = 6050 / (1.1²) = 6050 / 1.21 = ₹5000
ANSWER: ₹5000
37. RRB GROUP D 2022
Q. A PERSON LENT ₹8000 AT 12% P.A. SI FOR 2 YEARS. WHAT IS THE TOTAL AMOUNT?
SOLUTION:
SI = (8000 × 12 × 2)/100 = ₹1920 → TOTAL = ₹9920
ANSWER: ₹9920
38. SSC CHSL 2022
Q. IF ₹6400 BECOMES ₹7290 IN 2 YEARS AT CI, FIND THE RATE P.A.
SOLUTION:
(1 + R/100)² = 7290/6400 = 1.140625 → √ = 1.0675
R = 6.75%
✅ANSWER: 6.75%
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39. IBPS PO 2022
Q. WHAT IS THE DIFFERENCE BETWEEN CI AND SI FOR ₹5000 AT 10% FOR 2 YEARS?
SOLUTION:
CI = 5000 × 1.21 = ₹6050 → CI = ₹1050
SI = (5000 × 10 × 2)/100 = ₹1000
DIFFERENCE = ₹50
ANSWER: ₹50
40. SSC JE 2022
Q. WHAT WILL ₹7000 AMOUNT TO IN 3 YEARS AT 10% SI?
SOLUTION:
SI = 7000 × 10 × 3 / 100 = ₹2100 → AMOUNT = ₹9100
ANSWER: ₹9100
41. SSC CGL 2018
Q. A SUM AMOUNTS TO ₹9800 IN 2 YEARS AND ₹10780 IN 3 YEARS AT SI. WHAT IS THE RATE?
SOLUTION:
SI FOR 1 YEAR = ₹10780 − ₹9800 = ₹980
TOTAL SI FOR 2 YEARS = ₹980 × 2 = ₹1960
PRINCIPAL = ₹9800 − ₹1960 = ₹7840
RATE = (SI × 100) / (P × T) = (1960 × 100) / (7840 × 2) = 12.5%
ANSWER: 12.5%
42. RRB ALP 2019
Q. FIND THE COMPOUND INTEREST ON ₹6000 FOR 2 YEARS AT 10% COMPOUNDED ANNUALLY.
SOLUTION:
A = 6000 × (1.10)² = 6000 × 1.21 = ₹7260 → CI = ₹1260
ANSWER: ₹1260
43. NDA 2017
Q. A SUM TRIPLES IN 10 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
LET P = ₹100, AMOUNT = ₹300 → SI = ₹200
T = 10 YEARS
R = (SI × 100) / (P × T) = (200 × 100) / (100 × 10) = 20%
ANSWER: 20%
44. SSC CHSL 2020
Q. A PERSON EARNS ₹750 AS SI IN 3 YEARS AT 5% P.A. FIND THE PRINCIPAL.
SOLUTION:
P = (SI × 100) / (R × T) = (750 × 100) / (5 × 3) = ₹5000
ANSWER: ₹5000
45. IBPS PO 2017
Q. IF ₹10,000 AMOUNTS TO ₹11,025 IN 1 YEAR COMPOUNDED HALF-YEARLY, WHAT IS THE RATE?
SOLUTION:
A = P(1 + R/2×100)^2 = 10000(1 + R/200)^2 = 11025
(1 + R/200)^2 = 1.1025 → √ = 1.05 → R/200 = 0.05 → R = 10%
ANSWER: 10%
46. SBI CLERK 2018
Q. CI ON ₹8000 FOR 2 YEARS AT 12% COMPOUNDED ANNUALLY?
SOLUTION:
A = 8000 × (1.12)² = 8000 × 1.2544 = ₹10035.2 → CI = ₹2035.2
ANSWER: ₹2035.20
47. SSC GD 2021
Q. WHAT IS SI ON ₹9000 FOR 4 YEARS AT 6.5%?
SOLUTION:
SI = (9000 × 6.5 × 4)/100 = ₹2340
ANSWER: ₹2340
48. RRB JE 2019
Q. FIND AMOUNT ON ₹7500 FOR 3 YEARS AT 4% SI.
SOLUTION:
SI = (7500 × 4 × 3)/100 = ₹900 → AMOUNT = ₹8400
ANSWER: ₹8400
49. CDS 2020
Q. A SUM BECOMES ₹5832 IN 2 YEARS AT CI AT 8%. FIND THE PRINCIPAL.
SOLUTION:
A = P(1.08)² = 1.1664
P = 5832 / 1.1664 = ₹5000
ANSWER: ₹5000
50. SSC MTS 2021
Q. WHAT IS THE CI ON ₹1000 AT 5% P.A. COMPOUNDED ANNUALLY FOR 3 YEARS?
SOLUTION:
A = 1000 × (1.05)³ = 1000 × 1.157625 = ₹1157.63
CI = ₹157.63
ANSWER: ₹157.63
51. IBPS RRB CLERK 2020
Q. ₹1500 BECOMES ₹1728 IN 2 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
(1 + R/100)² = 1728/1500 = 1.152 → √ = 1.0735
R = 7.35% (APPROX)
ANSWER: 7.35%
52. NDA 2016
Q. FIND SI ON ₹1600 FOR 5 YEARS AT 4% P.A.
SOLUTION:
SI = (1600 × 4 × 5)/100 = ₹320
ANSWER: ₹320
53. SSC CGL 2019
Q. FIND DIFFERENCE BETWEEN CI AND SI ON ₹10000 AT 8% FOR 2 YEARS.
SOLUTION:
SI = 10000 × 8 × 2 / 100 = ₹1600
CI = 10000 × (1.08)² − 10000 = 10000 × 1.1664 − 10000 = ₹1664
DIFFERENCE = ₹64
ANSWER: ₹64
54. IBPS SO 2021
Q. FIND CI ON ₹5000 AT 15% P.A. FOR 2 YEARS.
SOLUTION:
A = 5000 × (1.15)² = 5000 × 1.3225 = ₹6612.5
CI = ₹1612.5
ANSWER: ₹1612.50
55. SSC CHSL 2022
Q. A MAN LENT ₹12000 FOR 2 YEARS AND GOT ₹2400 AS SI. FIND THE RATE.
SOLUTION:
R = (SI × 100) / (P × T) = 2400 × 100 / (12000 × 2) = 10%
ANSWER: 10%
56. RRB NTPC 2019
Q. CI ON ₹2000 FOR 2 YEARS AT 5% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 2000 × (1.05)² = 2000 × 1.1025 = ₹2205
CI = ₹205
ANSWER: ₹205
57. SSC JE 2021
Q. IF ₹500 BECOMES ₹605 IN 2 YEARS AT CI, FIND THE RATE.
SOLUTION:
(1 + R/100)² = 605/500 = 1.21 → √ = 1.1 → R = 10%
ANSWER: 10%
58. SBI PO MAINS 2019
Q. A PERSON INVESTS ₹20000 AT CI 10% P.A. FOR 2 YEARS. FIND THE CI.
SOLUTION:
A = 20000 × (1.10)² = 20000 × 1.21 = ₹24200
CI = ₹4200
ANSWER: ₹4200
59. CDS 2018
Q. ₹3200 GIVES ₹576 AS SI IN 3 YEARS. FIND RATE.
SOLUTION:
R = (576 × 100)/(3200 × 3) = 6%
ANSWER: 6%
60. SSC GD 2022
Q. FIND CI ON ₹12000 AT 6% P.A. FOR 2 YEARS.
SOLUTION:
A = 12000 × (1.06)² = ₹12000 × 1.1236 = ₹13483.2 → CI = ₹1483.20
ANSWER: ₹1483.20
61. SSC CGL 2017
Q. A SUM BECOMES ₹4840 IN 2 YEARS AT 10% CI P.A. FIND THE PRINCIPAL.
SOLUTION:
A = P(1.10)² = P × 1.21
P = 4840 / 1.21 = ₹4000
ANSWER: ₹4000
62. IBPS CLERK 2017
Q. WHAT IS THE SI ON ₹6400 AT 5% FOR 3 YEARS?
SOLUTION:
SI = (6400 × 5 × 3)/100 = ₹960
ANSWER: ₹960
63. SSC CHSL 2019
Q. THE CI ON ₹12000 AT 6% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY IS?
SOLUTION:
A = 12000 × 1.1236 = ₹13483.20 → CI = ₹1483.20
ANSWER: ₹1483.20
64. RRB JE 2018
Q. A SUM EARNS ₹1800 SI IN 3 YEARS AT 6%. FIND THE PRINCIPAL.
SOLUTION:
P = (1800 × 100)/(6 × 3) = ₹10,000
ANSWER: ₹10,000
65. SBI PO 2020
Q. FIND CI ON ₹15000 FOR 2 YEARS AT 8% P.A. COMPOUNDED YEARLY.
SOLUTION:
A = 15000 × (1.08)² = 15000 × 1.1664 = ₹17496
CI = ₹17496 − ₹15000 = ₹2496
ANSWER: ₹2496
66. NDA 2019
Q. WHAT WILL BE THE SI ON ₹2500 AT 4% FOR 5 YEARS?
SOLUTION:
SI = (2500 × 4 × 5)/100 = ₹500
ANSWER: ₹500
67. SSC GD 2019
Q. CI ON ₹5000 AT 10% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × 1.21 = ₹6050 → CI = ₹1050
ANSWER: ₹1050
68. IBPS RRB PO 2022
Q. A PERSON INVESTS ₹4000 AT 8% CI FOR 3 YEARS. FIND THE AMOUNT.
SOLUTION:
A = 4000 × (1.08)³ = 4000 × 1.2597 = ₹5038.8
ANSWER: ₹5038.80
69. SSC JE 2020
Q. ₹3200 AMOUNTS TO ₹4096 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
(1 + R/100)² = 4096/3200 = 1.28 → √ = 1.131 → R ≈ 13.1%
ANSWER: 13.1%
70. SBI CLERK MAINS 2021
Q. FIND DIFFERENCE BETWEEN CI AND SI ON ₹7000 FOR 2 YEARS AT 6%.
SOLUTION:
SI = 7000 × 6 × 2 /100 = ₹840
CI = 7000 × 1.1236 = ₹7865.2 → CI = ₹865.2
DIFFERENCE = ₹25.2
ANSWER: ₹25.20
71. UPSC CSAT 2020
Q. ₹10000 GIVES ₹2200 AS SI IN 4 YEARS. FIND THE RATE.
SOLUTION:
R = (2200 × 100)/(10000 × 4) = 5.5%
ANSWER: 5.5%
72. IBPS PO PRELIMS 2021
Q. CI ON ₹12000 FOR 2 YEARS AT 10% COMPOUNDED YEARLY?
SOLUTION:
A = 12000 × (1.10)² = 12000 × 1.21 = ₹14520 → CI = ₹2520
ANSWER: ₹2520
73. SSC CGL 2016
Q. SI ON ₹2500 FOR 4 YEARS IS ₹600. WHAT IS THE RATE?
SOLUTION:
R = (600 × 100)/(2500 × 4) = 6%
ANSWER: 6%
74. CDS 2020
Q. A SUM BECOMES ₹6400 IN 3 YEARS AND ₹8000 IN 5 YEARS. FIND SI RATE.
SOLUTION:
SI FOR 2 YEARS = ₹1600
P = ₹6400
RATE = (1600 × 100)/(6400 × 2) = 12.5%
ANSWER: 12.5%
75. SSC CHSL 2018
Q. FIND CI ON ₹8000 FOR 2 YEARS AT 6.25% COMPOUNDED YEARLY.
SOLUTION:
A = 8000 × (1.0625)² = 8000 × 1.1289 = ₹9031.2 → CI = ₹1031.2
ANSWER: ₹1031.20
76. IBPS CLERK PRELIMS 2018
Q. A SUM BECOMES ₹7290 IN 2 YEARS AT CI AT 7%. FIND THE PRINCIPAL.
SOLUTION:
(1.07)² = 1.1449
P = 7290 / 1.1449 = ₹6366.59
ANSWER: ₹6366.59
77. NDA 2015
Q. A MAN INVESTED ₹4000 FOR 2 YEARS AT 6% P.A. SI. FIND THE TOTAL AMOUNT.
SOLUTION:
SI = (4000 × 6 × 2)/100 = ₹480 → AMOUNT = ₹4480
ANSWER: ₹4480
78. SSC GD 2022
Q. FIND SI ON ₹18000 AT 7.5% FOR 3 YEARS.
SOLUTION:
SI = (18000 × 7.5 × 3)/100 = ₹4050
ANSWER: ₹4050
79. IBPS SO 2017
Q. CI ON ₹5000 FOR 3 YEARS AT 10% COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × 1.331 = ₹6655 → CI = ₹1655
ANSWER: ₹1655
80. SSC MTS 2020
Q. A SUM EARNS ₹720 AS SI IN 2 YEARS AT 9%. FIND THE PRINCIPAL.
SOLUTION:
P = (720 × 100)/(9 × 2) = ₹4000
ANSWER: ₹4000
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT 10% CI. WHAT IS THE PRINCIPAL?
SOLUTION:
A = P(1.10)² → 6050 = P × 1.21 → P = 6050 / 1.21 = ₹5000
ANSWER: ₹5000
82. IBPS PO 2020
Q. WHAT IS THE DIFFERENCE BETWEEN CI AND SI ON ₹8000 AT 10% FOR 2 YEARS?
SOLUTION:
SI = 8000 × 10 × 2 /100 = ₹1600
CI = 8000 × 1.21 − 8000 = ₹9680 − 8000 = ₹1680
DIFFERENCE = ₹80
ANSWER: ₹80
83. SSC CHSL 2018
Q. FIND CI ON ₹12000 AT 7% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY.
SOLUTION:
A = 12000 × (1.07)² = 12000 × 1.1449 = ₹13738.80 → CI = ₹1738.80
ANSWER: ₹1738.80
84. RRB NTPC 2019
Q. ₹7500 BECOMES ₹8700 IN 2 YEARS AT SI. FIND THE RATE.
SOLUTION:
SI = ₹8700 − ₹7500 = ₹1200
R = (SI × 100)/(P × T) = (1200 × 100)/(7500 × 2) = 8%
ANSWER: 8%
85. NDA 2016
Q. CI ON ₹1000 FOR 2 YEARS AT 5% P.A. COMPOUNDED YEARLY?
SOLUTION:
A = 1000 × (1.05)² = ₹1102.5 → CI = ₹102.5
ANSWER: ₹102.50
86. IBPS CLERK 2019
Q. FIND CI ON ₹20000 FOR 2 YEARS AT 10% COMPOUNDED QUARTERLY.
SOLUTION:
N = 4 × 2 = 8; R = 10/4 = 2.5%
A = 20000 × (1.025)^8 ≈ ₹20000 × 1.2184 = ₹24368
CI = ₹4368
ANSWER: ₹4368
87. SSC JE 2021
Q. A SUM AT 4% P.A. CI COMPOUNDED YEARLY BECOMES ₹1081.60 IN 2 YEARS. FIND P.
SOLUTION:
P = A / (1.04)² = 1081.6 / 1.0816 = ₹1000
ANSWER: ₹1000
88. SBI PO MAINS 2019
Q. CI ON ₹15000 AT 6% FOR 2 YEARS COMPOUNDED HALF-YEARLY?
SOLUTION:
N = 4; R = 3%; A = 15000 × (1.03)^4 = ₹15000 × 1.1255 = ₹16882.5
CI = ₹1882.5
ANSWER: ₹1882.50
89. SSC GD 2020
Q. ₹5000 GIVES ₹600 AS SI IN 3 YEARS. FIND THE RATE.
SOLUTION:
R = (600 × 100)/(5000 × 3) = 4%
ANSWER: 4%
90. RRB ALP 2018
Q. CI ON ₹2400 AT 5% P.A. FOR 3 YEARS COMPOUNDED YEARLY?
SOLUTION:
A = 2400 × (1.05)^3 = 2400 × 1.1576 = ₹2778.24
CI = ₹378.24
ANSWER: ₹378.24
91. UPSC CSAT 2021
Q. A SUM BECOMES ₹11236 IN 2 YEARS AT 6% CI. FIND THE PRINCIPAL.
SOLUTION:
A = P × (1.06)^2 = 1.1236 → P = 11236 / 1.1236 = ₹10000
ANSWER: ₹10000
92. IBPS SO 2020
Q. FIND THE CI ON ₹5000 AT 20% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY.
SOLUTION:
A = 5000 × (1.2)^2 = 5000 × 1.44 = ₹7200 → CI = ₹2200
ANSWER: ₹2200
93. SSC CHSL 2022
Q. A SUM DOUBLES IN 5 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
2 = (1 + R/100)^5 → R ≈ 14.87% (USING LOGARITHM OR COMPOUND INTEREST TABLE)
ANSWER: 14.87%
94. NDA 2023
Q. ₹6000 GIVES ₹1440 AS SI IN 3 YEARS. FIND THE RATE.
SOLUTION:
R = (1440 × 100)/(6000 × 3) = 8%
ANSWER: 8%
95. IBPS RRB 2019
Q. FIND THE AMOUNT ON ₹16000 FOR 2 YEARS AT 12.5% SI.
SOLUTION:
SI = (16000 × 12.5 × 2)/100 = ₹4000 → AMOUNT = ₹20000
ANSWER: ₹20000
96. SSC CGL 2015
Q. CI ON ₹10000 FOR 2 YEARS AT 7.5% P.A. COMPOUNDED YEARLY?
SOLUTION:
A = 10000 × (1.075)^2 = ₹11556.25 → CI = ₹1556.25
ANSWER: ₹1556.25
97. IBPS CLERK PRELIMS 2022
Q. WHAT IS THE DIFFERENCE BETWEEN CI AND SI ON ₹12000 AT 6% FOR 2 YEARS?
SOLUTION:
SI = ₹1440; CI = 12000 × 1.1236 − 12000 = ₹1483.20 → DIFF = ₹43.20
ANSWER: ₹43.20
98. SSC JE 2022
Q. ₹7200 BECOMES ₹8640 IN 2 YEARS AT SI. FIND THE RATE.
SOLUTION:
SI = 1440 → R = (1440 × 100)/(7200 × 2) = 10%
✅ANSWER: 10%
99. RRB NTPC 2021
Q. CI ON ₹5000 AT 10% P.A. COMPOUNDED ANNUALLY FOR 3 YEARS?
SOLUTION:
A = 5000 × (1.10)^3 = 5000 × 1.331 = ₹6655 → CI = ₹1655
ANSWER: ₹1655
100. CDS 2019
Q. SI ON ₹4000 AT 6.25% FOR 4 YEARS?
SOLUTION:
SI = (4000 × 6.25 × 4)/100 = ₹1000
ANSWER: ₹1000
101. SSC CGL 2021
Q. FIND SI ON ₹9600 AT 6.25% FOR 2 YEARS.
SOLUTION:
SI = (9600 × 6.25 × 2)/100 = ₹1200
ANSWER: ₹1200
102. IBPS PO 2018
Q. CI ON ₹8000 AT 10% P.A. COMPOUNDED ANNUALLY FOR 3 YEARS?
SOLUTION:
A = 8000 × (1.1)³ = 8000 × 1.331 = ₹10648
CI = ₹2648
ANSWER: ₹2648
103. SSC JE 2020
Q. A SUM AMOUNTS TO ₹12100 IN 2 YEARS AT 10% CI. FIND THE PRINCIPAL.
SOLUTION:
A = P × 1.21 → P = 12100 / 1.21 = ₹10000
ANSWER: ₹10000
104. SBI CLERK 2022
Q. ₹7500 BECOMES ₹8700 IN 2 YEARS. FIND SI RATE.
SOLUTION:
SI = ₹1200; R = (1200 × 100)/(7500 × 2) = 8%
ANSWER: 8%
105. RRB ALP 2020
Q. WHAT IS CI ON ₹4000 AT 5% FOR 3 YEARS?
SOLUTION:
A = 4000 × (1.05)³ = 4000 × 1.157625 = ₹4630.5
CI = ₹630.5
ANSWER: ₹630.50
106. SSC MTS 2019
Q. A MAN GOT ₹1200 AS SI ON ₹8000 IN 3 YEARS. FIND THE RATE.
SOLUTION:
R = (1200 × 100)/(8000 × 3) = 5%
ANSWER: 5%
107. NDA 2017
Q. FIND CI ON ₹6000 FOR 2 YEARS AT 7.5% P.A. COMPOUNDED ANNUALLY.
SOLUTION:
A = 6000 × (1.075)² = 6000 × 1.1556 = ₹6933.6
CI = ₹933.6
ANSWER: ₹933.60
108. IBPS CLERK 2020
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND THE INTEREST.
SOLUTION:
P = ₹10000 → CI = ₹12100 − ₹10000 = ₹2100
ANSWER: ₹2100
109. SSC GD 2022
Q. ₹10000 BECOMES ₹12100 IN 2 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
(1 + R/100)² = 12100/10000 = 1.21 → √ = 1.1 → R = 10%
ANSWER: 10%
110. UPSC CSAT 2020
Q. ₹5000 AMOUNTS TO ₹6200 IN 3 YEARS. FIND SI RATE.
SOLUTION:
SI = 1200; R = (1200 × 100)/(5000 × 3) = 8%
ANSWER: 8%
111. SSC CHSL 2021
Q. A SUM DOUBLES IN 8 YEARS AT SI. FIND THE RATE.
SOLUTION:
SI = P → P = P × R × 8 /100 → R = 100/8 = 12.5%
ANSWER: 12.5%
112. RRB JE 2021
Q. FIND CI ON ₹10000 AT 10% FOR 2 YEARS COMPOUNDED HALF-YEARLY.
SOLUTION:
N = 4, R = 5%; A = 10000 × (1.05)⁴ = ₹12155
CI = ₹2155
ANSWER: ₹2155
113. SSC CGL 2020
Q. ₹12000 BECOMES ₹14520 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
(1 + R/100)² = 14520/12000 = 1.21 → R = 10%
ANSWER: 10%
114. NDA 2019
Q. A SUM EARNS ₹1680 IN 3 YEARS AT 7%. FIND PRINCIPAL.
SOLUTION:
P = (1680 × 100)/(3 × 7) = ₹8000
ANSWER: ₹8000
115. IBPS RRB CLERK 2021
Q. ₹4000 BECOMES ₹4840 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
(1 + R/100)² = 4840/4000 = 1.21 → R = 10%
ANSWER: 10%
116. SSC JE 2022
Q. SI ON ₹9000 FOR 2 YEARS IS ₹1260. FIND THE RATE.
SOLUTION:
R = (1260 × 100)/(9000 × 2) = 7%
ANSWER: 7%
117. SBI PO 2021
Q. CI ON ₹10000 AT 5% P.A. FOR 2 YEARS?
SOLUTION:
A = 10000 × (1.05)² = ₹11025 → CI = ₹1025
ANSWER: ₹1025
118. SSC MTS 2020
Q. A SUM BECOMES ₹6720 IN 2 YEARS AT 12% CI. FIND PRINCIPAL.
SOLUTION:
P = 6720 / (1.12)² = 6720 / 1.2544 = ₹5357.14
ANSWER: ₹5357.14
119. RRB ALP 2017
Q. ₹2400 BECOMES ₹2646 IN 2 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
(1 + R/100)² = 2646/2400 = 1.1025 → √ = 1.05 → R = 5%
ANSWER: 5%
120. CDS 2022
Q. SI ON ₹7200 AT 6.25% FOR 3 YEARS?
SOLUTION:
SI = (7200 × 6.25 × 3)/100 = ₹1350
ANSWER: ₹1350
121. SSC CGL 2022
Q. CI ON ₹8000 FOR 2 YEARS AT 12% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 8000 × (1.12)² = 8000 × 1.2544 = ₹10035.2 → CI = ₹2035.2
ANSWER: ₹2035.20
122. IBPS CLERK 2017
Q. ₹7200 BECOMES ₹9000 IN 4 YEARS. FIND SI RATE.
SOLUTION:
SI = ₹1800 → R = (1800 × 100) / (7200 × 4) = 6.25%
ANSWER: 6.25%
123. SSC JE 2019
Q. WHAT IS THE CI ON ₹10000 AT 6% P.A. FOR 2 YEARS?
SOLUTION:
A = 10000 × (1.06)² = 10000 × 1.1236 = ₹11236 → CI = ₹1236
ANSWER: ₹1236
124. NDA 2020
Q. SI ON ₹3000 IN 3 YEARS IS ₹540. FIND THE RATE.
SOLUTION:
R = (540 × 100)/(3000 × 3) = 6%
ANSWER: 6%
125. IBPS PO 2018
Q. CI ON ₹15000 AT 10% P.A. FOR 2 YEARS, COMPOUNDED ANNUALLY?
SOLUTION:
A = 15000 × (1.1)² = 15000 × 1.21 = ₹18150 → CI = ₹3150
ANSWER: ₹3150
126. SSC GD 2021
Q. A SUM BECOMES ₹7920 IN 2 YEARS AT 10% CI. FIND THE PRINCIPAL.
SOLUTION:
P = 7920 / (1.1)² = 7920 / 1.21 = ₹6545.45
ANSWER: ₹6545.45
127. RRB ALP 2019
Q. FIND THE SI ON ₹9600 AT 8% FOR 3 YEARS.
SOLUTION:
SI = (9600 × 8 × 3)/100 = ₹2304
ANSWER: ₹2304
128. SBI CLERK 2020
Q. CI ON ₹20000 FOR 2 YEARS AT 6% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 20000 × (1.06)² = 20000 × 1.1236 = ₹22472
CI = ₹2472
ANSWER: ₹2472
129. SSC CHSL 2019
Q. WHAT IS THE SI ON ₹5000 FOR 5 YEARS AT 5%?
SOLUTION:
SI = (5000 × 5 × 5)/100 = ₹1250
ANSWER: ₹1250
130. UPSC CSAT 2021
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT 10% CI. FIND THE INTEREST.
SOLUTION:
A = ₹6050, P = ₹5000 → CI = ₹1050
ANSWER: ₹1050
131. SSC MTS 2022
Q. ₹3000 BECOMES ₹3300 IN 2 YEARS AT SI. FIND THE RATE.
SOLUTION:
SI = ₹300 → R = (300 × 100)/(3000 × 2) = 5%
ANSWER: 5%
132. IBPS RRB CLERK 2022
Q. CI ON ₹6000 AT 10% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 6000 × 1.21 = ₹7260 → CI = ₹1260
ANSWER: ₹1260
133. NDA 2023
Q. A SUM TRIPLES IN 10 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
IF SI = 2P → R = (2 × 100)/(10) = 20%
ANSWER: 20%
134. SSC CGL TIER-II 2020
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT CI AT 10%. WHAT IS THE PRINCIPAL?
SOLUTION:
P = 14520 / 1.21 = ₹12000
ANSWER: ₹12000
135. IBPS SO 2019
Q. FIND CI ON ₹10000 AT 8% P.A. FOR 3 YEARS, COMPOUNDED ANNUALLY.
SOLUTION:
A = 10000 × (1.08)³ = 10000 × 1.2597 = ₹12597
CI = ₹2597
ANSWER: ₹2597
136. SSC JE 2021
Q. FIND SI ON ₹7200 AT 7% FOR 3 YEARS.
SOLUTION:
SI = (7200 × 7 × 3)/100 = ₹1512
ANSWER: ₹1512
137. IBPS PO MAINS 2021
Q. FIND DIFFERENCE BETWEEN CI AND SI ON ₹9000 FOR 2 YEARS AT 10%.
SOLUTION:
CI = 9000 × 1.21 = ₹10890 → SI = ₹1800 → CI − SI = ₹90
ANSWER: ₹90
138. SSC GD 2022
Q. FIND CI ON ₹1000 AT 5% P.A. FOR 3 YEARS.
SOLUTION:
A = 1000 × (1.05)³ = ₹1157.63 → CI = ₹157.63
ANSWER: ₹157.63
139. RRB JE 2018
Q. FIND SI ON ₹6500 AT 6% FOR 2 YEARS.
SOLUTION:
SI = (6500 × 6 × 2)/100 = ₹780
ANSWER: ₹780
140. CDS 2022
Q. CI ON ₹10000 AT 15% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 10000 × (1.15)² = 10000 × 1.3225 = ₹13225 → CI = ₹3225
✅ANSWER: ₹3225
141. SSC CHSL 2021
Q. FIND SI ON ₹8400 AT 7.5% FOR 3 YEARS.
SOLUTION:
SI = (8400 × 7.5 × 3) / 100 = ₹1890
ANSWER: ₹1890
142. IBPS PO 2016
Q. A SUM AMOUNTS TO ₹13230 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
A = P(1.1)² = P × 1.21 → P = 13230 / 1.21 = ₹10942.15
✅ANSWER: ₹10942.15
143. SSC GD 2020
Q. FIND CI ON ₹9600 AT 8% FOR 2 YEARS COMPOUNDED ANNUALLY.
SOLUTION:
A = 9600 × 1.1664 = ₹11277.44 → CI = ₹1677.44
ANSWER: ₹1677.44
144. NDA 2021
Q. A SUM TRIPLES IN 12 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
TRIPLES = 2P SI → R = (200 × 100)/(P × 12P) = 200/12 = 16.67%
ANSWER: 16.67%
145. RRB NTPC 2019
Q. CI ON ₹4000 AT 12% P.A. FOR 2 YEARS COMPOUNDED YEARLY?
SOLUTION:
A = 4000 × (1.12)² = 4000 × 1.2544 = ₹5017.6 → CI = ₹1017.6
ANSWER: ₹1017.60
146. SSC JE 2022
Q. ₹6400 BECOMES ₹7290 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 7290/6400 = 1.139 → √ = 1.0675 → R = 6.75%
ANSWER: 6.75%
147. IBPS CLERK 2018
Q. SI ON ₹15000 AT 6.25% FOR 4 YEARS?
SOLUTION:
SI = (15000 × 6.25 × 4)/100 = ₹3750
ANSWER: ₹3750
148. SSC CGL 2019
Q. FIND CI ON ₹5000 AT 10% FOR 2 YEARS COMPOUNDED HALF-YEARLY.
SOLUTION:
N = 4; R = 5%; A = 5000 × (1.05)^4 = ₹5000 × 1.2155 = ₹6077.5
CI = ₹1077.5
ANSWER: ₹1077.50
149. SBI CLERK 2022
Q. A SUM EARNS ₹960 AS SI IN 3 YEARS AT 8%. FIND PRINCIPAL.
SOLUTION:
P = (960 × 100) / (8 × 3) = ₹4000
ANSWER: ₹4000
150. CDS 2020
Q. CI ON ₹8000 AT 15% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 8000 × 1.3225 = ₹10580 → CI = ₹2580
ANSWER: ₹2580
151. SSC CHSL 2020
Q. A MAN LENT ₹5000 FOR 2 YEARS AT 5% SI. FIND INTEREST.
SOLUTION:
SI = (5000 × 5 × 2)/100 = ₹500
ANSWER: ₹500
152. IBPS RRB CLERK 2021
Q. CI ON ₹10000 FOR 2 YEARS AT 6% COMPOUNDED QUARTERLY?
SOLUTION:
N = 8, R = 1.5%; A = 10000 × (1.015)^8 = ₹11268.25 → CI = ₹1268.25
ANSWER: ₹1268.25
153. SSC JE 2020
Q. SI ON ₹8400 FOR 2 YEARS IS ₹1344. FIND RATE.
SOLUTION:
R = (1344 × 100)/(8400 × 2) = 8%
ANSWER: 8%
154. NDA 2018
Q. ₹12000 BECOMES ₹14400 IN 3 YEARS AT SI. FIND RATE.
SOLUTION:
SI = ₹2400 → R = (2400 × 100)/(12000 × 3) = 6.67%
ANSWER: 6.67%
155. SSC GD 2021
Q. CI ON ₹5000 AT 8% FOR 3 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × (1.08)^3 = 5000 × 1.2597 = ₹6298.5 → CI = ₹1298.5
ANSWER: ₹1298.50
156. IBPS SO 2022
Q. SI ON ₹7000 FOR 3 YEARS AT 5.5%?
SOLUTION:
SI = (7000 × 5.5 × 3)/100 = ₹1155
ANSWER: ₹1155
157. SSC MTS 2022
Q. ₹3000 BECOMES ₹3540 IN 3 YEARS. FIND SI RATE.
SOLUTION:
SI = ₹540 → R = (540 × 100)/(3000 × 3) = 6%
ANSWER: 6%
158. RRB ALP 2018
Q. CI ON ₹10000 FOR 2 YEARS AT 8% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 10000 × 1.1664 = ₹11664 → CI = ₹1664
ANSWER: ₹1664
159. SSC JE 2021
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT CI 10%. FIND PRINCIPAL.
SOLUTION:
P = 12100 / 1.21 = ₹10000
ANSWER: ₹10000
160. IBPS PO 2020
Q. FIND SI ON ₹4800 AT 6.25% FOR 2 YEARS.
SOLUTION:
SI = (4800 × 6.25 × 2)/100 = ₹600
ANSWER: ₹600
161. SSC CGL 2020
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT CI OF 10% P.A. FIND PRINCIPAL.
SOLUTION:
A = P(1.10)² → P = 6050 / 1.21 = ₹5000
ANSWER: ₹5000
162. IBPS CLERK 2021
Q. SI ON ₹6400 FOR 2.5 YEARS AT 6%?
SOLUTION:
SI = (6400 × 6 × 2.5)/100 = ₹960
ANSWER: ₹960
163. SSC JE 2020
Q. CI ON ₹10000 AT 5% P.A. FOR 2 YEARS?
SOLUTION:
A = 10000 × (1.05)² = ₹11025 → CI = ₹1025
ANSWER: ₹1025
164. NDA 2019
Q. ₹6000 BECOMES ₹6960 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
A/P = 6960/6000 = 1.16 → √1.16 = 1.077 → R = 7.7% APPROX
ANSWER: 7.7%
165. RRB NTPC 2020
Q. CI ON ₹5000 AT 10% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × 1.21 = ₹6050 → CI = ₹1050
ANSWER: ₹1050
166. SSC CHSL 2021
Q. SI ON ₹7500 AT 8% P.A. FOR 2 YEARS?
SOLUTION:
SI = (7500 × 8 × 2)/100 = ₹1200
ANSWER: ₹1200
167. IBPS RRB PO 2019
Q. A SUM TRIPLES IN 20 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
2P = SI → R = (2 × 100)/20 = 10%
ANSWER: 10%
168. SSC MTS 2020
Q. FIND CI ON ₹6400 AT 6.25% FOR 2 YEARS COMPOUNDED ANNUALLY.
SOLUTION:
A = 6400 × (1.0625)² = 6400 × 1.1289 = ₹7224.96
CI = ₹824.96
ANSWER: ₹824.96
169. SBI PO 2021
Q. A MAN EARNS ₹1200 AS SI ON ₹8000 IN 3 YEARS. FIND RATE.
SOLUTION:
R = (1200 × 100)/(8000 × 3) = 5%
ANSWER: 5%
170. SSC GD 2022
Q. CI ON ₹3000 FOR 2 YEARS AT 10% COMPOUNDED ANNUALLY?
SOLUTION:
A = 3000 × 1.21 = ₹3630 → CI = ₹630
ANSWER: ₹630
171. UPSC CSAT 2020
Q. ₹8000 BECOMES ₹9680 IN 2 YEARS. FIND THE CI RATE.
SOLUTION:
A = ₹9680 → P = ₹8000 → A/P = 1.21 → R = 10%
ANSWER: 10%
172. IBPS CLERK 2019
Q. SI ON ₹4000 FOR 4 YEARS AT 6.25% P.A.?
SOLUTION:
SI = (4000 × 6.25 × 4)/100 = ₹1000
ANSWER: ₹1000
173. SSC JE 2022
Q. A SUM DOUBLES IN 8 YEARS UNDER SI. WHAT IS THE RATE?
SOLUTION:
SI = P → R = (100 × 1)/(8) = 12.5%
ANSWER: 12.5%
174. RRB ALP 2018
Q. CI ON ₹8000 AT 7.5% FOR 2 YEARS COMPOUNDED YEARLY?
SOLUTION:
A = 8000 × (1.075)² = 8000 × 1.1556 = ₹9244.8 → CI = ₹1244.8
ANSWER: ₹1244.80
175. SSC CHSL 2019
Q. SI ON ₹6000 AT 5% FOR 3 YEARS?
SOLUTION:
SI = (6000 × 5 × 3)/100 = ₹900
ANSWER: ₹900
176. IBPS PO 2022
Q. A SUM BECOMES ₹11236 IN 2 YEARS AT 6% CI. FIND PRINCIPAL.
SOLUTION:
P = 11236 / 1.1236 = ₹10000
ANSWER: ₹10000
177. SSC CGL 2017
Q. ₹7000 BECOMES ₹8820 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 1.26 → √1.26 ≈ 1.122 → R ≈ 12.2%
ANSWER: 12.2%
178. NDA 2018
Q. CI ON ₹10000 AT 12% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 10000 × 1.2544 = ₹12544 → CI = ₹2544
ANSWER: ₹2544
179. SSC MTS 2021
Q. SI ON ₹4800 AT 5% FOR 3 YEARS?
SOLUTION:
SI = (4800 × 5 × 3)/100 = ₹720
ANSWER: ₹720
180. CDS 2019
Q. A SUM AMOUNTS TO ₹12100 IN 2 YEARS AT 10% CI. FIND INTEREST EARNED.
SOLUTION:
P = 12100 / 1.21 = ₹10000 → CI = ₹2100
ANSWER: ₹2100
181. SSC JE 2019
Q. CI ON ₹6400 FOR 2 YEARS AT 6.25% P.A. COMPOUNDED ANNUALLY?
SOLUTION:
A = 6400 × (1.0625)² = 6400 × 1.1289 = ₹7225.12
CI = ₹825.12
ANSWER: ₹825.12
182. IBPS PO 2021
Q. ₹9000 BECOMES ₹10890 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
A/P = 1.21 → √1.21 = 1.10 → R = 10%
ANSWER: 10%
183. SSC GD 2021
Q. FIND SI ON ₹8400 AT 8% FOR 3 YEARS.
SOLUTION:
SI = (8400 × 8 × 3)/100 = ₹2016
ANSWER: ₹2016
184. RRB NTPC 2018
Q. CI ON ₹5000 AT 10% FOR 2 YEARS, COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × (1.1)² = ₹6050 → CI = ₹1050
ANSWER: ₹1050
185. NDA 2020
Q. A SUM AMOUNTS TO ₹14400 IN 3 YEARS AT 6.67% SI. FIND PRINCIPAL.
SOLUTION:
LET P = X; SI = X × 6.67 × 3 / 100 = 0.2X
⇒ X + 0.2X = 14400 ⇒ 1.2X = 14400 ⇒ X = ₹12000
ANSWER: ₹12000
186. IBPS CLERK 2020
Q. SI ON ₹9600 FOR 2.5 YEARS AT 6%?
SOLUTION:
SI = (9600 × 6 × 2.5)/100 = ₹1440
ANSWER: ₹1440
187. SSC CHSL 2022
Q. CI ON ₹8000 AT 12% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 8000 × (1.12)² = 8000 × 1.2544 = ₹10035.2
CI = ₹2035.2
ANSWER: ₹2035.20
188. IBPS RRB CLERK 2019
Q. A SUM BECOMES ₹8478 IN 2 YEARS AT CI OF 10%. FIND PRINCIPAL.
SOLUTION:
P = 8478 / 1.21 = ₹7000
ANSWER: ₹7000
189. SSC CGL TIER-I 2021
Q. SI ON ₹4500 FOR 4 YEARS AT 5%?
SOLUTION:
SI = (4500 × 5 × 4)/100 = ₹900
ANSWER: ₹900
190. SBI PO 2022
Q. ₹10000 BECOMES ₹11664 IN 2 YEARS. FIND THE CI RATE.
SOLUTION:
A/P = 1.1664 → √ = 1.08 → R = 8%
ANSWER: 8%
191. SSC JE 2021
Q. CI ON ₹4000 AT 10% FOR 3 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 4000 × (1.1)³ = 4000 × 1.331 = ₹5324 → CI = ₹1324
ANSWER: ₹1324
192. RRB ALP 2021
Q. SI ON ₹5000 AT 9% FOR 2 YEARS?
SOLUTION:
SI = (5000 × 9 × 2)/100 = ₹900
ANSWER: ₹900
193. SSC GD 2022
Q. ₹6000 BECOMES ₹7200 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 7200/6000 = 1.2 ⇒ √1.2 ≈ 1.095 → R ≈ 9.5%
ANSWER: 9.5%
194. NDA 2023
Q. SI ON ₹3000 FOR 5 YEARS IS ₹750. FIND RATE.
SOLUTION:
R = (750 × 100)/(3000 × 5) = 5%
ANSWER: 5%
195. IBPS SO 2021
Q. CI ON ₹10000 FOR 2 YEARS AT 7% COMPOUNDED YEARLY?
SOLUTION:
A = 10000 × (1.07)² = 10000 × 1.1449 = ₹11449 → CI = ₹1449
ANSWER: ₹1449
196. SSC CHSL 2020
Q. SI ON ₹8000 AT 6.25% FOR 3 YEARS?
SOLUTION:
SI = (8000 × 6.25 × 3)/100 = ₹1500
ANSWER: ₹1500
197. IBPS CLERK 2022
Q. FIND THE CI ON ₹12000 AT 5% P.A. COMPOUNDED YEARLY FOR 2 YEARS.
SOLUTION:
A = 12000 × (1.05)² = ₹12000 × 1.1025 = ₹13230 → CI = ₹1230
ANSWER: ₹1230
198. SSC MTS 2022
Q. SI ON ₹7000 AT 5% FOR 2 YEARS?
SOLUTION:
SI = (7000 × 5 × 2)/100 = ₹700
ANSWER: ₹700
199. RRB JE 2018
Q. CI ON ₹15000 AT 10% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 15000 × 1.21 = ₹18150 → CI = ₹3150
ANSWER: ₹3150
200. CDS 2023
Q. A SUM DOUBLES IN 10 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
SI = P → R = 100/10 = 10%
ANSWER: 10%
201. SSC CHSL 2021
Q. FIND THE CI ON ₹9000 FOR 2 YEARS AT 5% P.A. COMPOUNDED ANNUALLY.
SOLUTION:
A = 9000 × (1.05)² = 9000 × 1.1025 = ₹9922.5
CI = ₹922.5
ANSWER: ₹922.50
202. IBPS PO 2019
Q. A SUM BECOMES ₹6600 IN 2 YEARS AT 10% P.A. CI. FIND PRINCIPAL.
SOLUTION:
A = P(1.10)² = P × 1.21 → P = 6600 / 1.21 = ₹5454.55
ANSWER: ₹5454.55
203. SSC JE 2022
Q. SI ON ₹7200 AT 6.25% P.A. FOR 2 YEARS?
SOLUTION:
SI = (7200 × 6.25 × 2)/100 = ₹900
ANSWER: ₹900
204. NDA 2019
Q. A SUM BECOMES ₹11236 IN 2 YEARS AT 6% CI. FIND INTEREST EARNED.
SOLUTION:
P = 11236 / 1.1236 = ₹10000 → CI = ₹1236
ANSWER: ₹1236
205. RRB ALP 2017
Q. CI ON ₹8000 AT 10% FOR 2 YEARS COMPOUNDED YEARLY?
SOLUTION:
A = 8000 × (1.1)² = 8000 × 1.21 = ₹9680 → CI = ₹1680
ANSWER: ₹1680
206. SSC GD 2022
Q. SI ON ₹6000 FOR 3 YEARS AT 5%?
SOLUTION:
SI = (6000 × 5 × 3)/100 = ₹900
ANSWER: ₹900
207. IBPS CLERK 2020
Q. A SUM DOUBLES IN 8 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
SI = P → R = (100 × 1)/8 = 12.5%
ANSWER: 12.5%
208. SSC CGL 2020
Q. CI ON ₹10000 FOR 2 YEARS AT 6.25% COMPOUNDED YEARLY?
SOLUTION:
A = 10000 × (1.0625)² = 10000 × 1.1289 = ₹11289 → CI = ₹1289
ANSWER: ₹1289
209. SBI PO 2022
Q. ₹6400 BECOMES ₹7225 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 1.1289 → √ = 1.0625 → R = 6.25%
ANSWER: 6.25%
210. SSC JE 2021
Q. SI ON ₹8400 AT 5% FOR 2 YEARS?
SOLUTION:
SI = (8400 × 5 × 2)/100 = ₹840
ANSWER: ₹840
211. IBPS SO 2018
Q. FIND CI ON ₹15000 FOR 2 YEARS AT 12% COMPOUNDED ANNUALLY.
SOLUTION:
A = 15000 × (1.12)² = 15000 × 1.2544 = ₹18816 → CI = ₹3816
ANSWER: ₹3816
212. SSC MTS 2021
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND CI.
SOLUTION:
P = ₹10000 → CI = ₹2100
ANSWER: ₹2100
213. RRB NTPC 2020
Q. SI ON ₹9000 AT 4% FOR 3 YEARS?
SOLUTION:
SI = (9000 × 4 × 3)/100 = ₹1080
ANSWER: ₹1080
214. NDA 2018
Q. ₹5000 BECOMES ₹5832 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 5832/5000 = 1.1664 → √ = 1.08 → R = 8%
ANSWER: 8%
215. IBPS RRB CLERK 2021
Q. CI ON ₹7500 AT 6% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 7500 × (1.06)² = 7500 × 1.1236 = ₹8427 → CI = ₹927
ANSWER: ₹927
216. SSC CHSL 2022
Q. SI ON ₹4000 AT 8% FOR 3 YEARS?
SOLUTION:
SI = (4000 × 8 × 3)/100 = ₹960
ANSWER: ₹960
217. IBPS PO 2020
Q. ₹10000 BECOMES ₹12100 IN 2 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
(1 + R/100)² = 1.21 → R = 10%
ANSWER: 10%
218. SSC GD 2021
Q. CI ON ₹12000 FOR 2 YEARS AT 5% P.A.?
SOLUTION:
A = 12000 × 1.1025 = ₹13230 → CI = ₹1230
ANSWER: ₹1230
219. SBI CLERK 2022
Q. A SUM TRIPLES IN 12 YEARS UNDER SI. FIND RATE.
SOLUTION:
SI = 2P → R = 200/12 = 16.67%
ANSWER: 16.67%
220. SSC JE 2020
Q. SI ON ₹9000 AT 7.5% FOR 2 YEARS?
SOLUTION:
SI = (9000 × 7.5 × 2)/100 = ₹1350
ANSWER: ₹1350
221. SSC CHSL 2021
Q. FIND THE SI ON ₹6400 FOR 3 YEARS AT 5.5% P.A.
SOLUTION:
SI = (6400 × 5.5 × 3)/100 = ₹1056
ANSWER: ₹1056
222. IBPS CLERK 2022
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND THE INTEREST EARNED.
SOLUTION:
P = 12100 / 1.21 = ₹10000 → CI = ₹2100
ANSWER: ₹2100
223. SSC GD 2022
Q. CI ON ₹15000 AT 8% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 15000 × (1.08)² = 15000 × 1.1664 = ₹17496 → CI = ₹2496
ANSWER: ₹2496
224. SBI PO 2020
Q. A SUM BECOMES ₹9680 IN 2 YEARS AT 10% P.A. CI. FIND PRINCIPAL.
SOLUTION:
P = 9680 / 1.21 = ₹8000
ANSWER: ₹8000
225. SSC JE 2022
Q. SI ON ₹6000 AT 6.25% FOR 3 YEARS?
SOLUTION:
SI = (6000 × 6.25 × 3)/100 = ₹1125
ANSWER: ₹1125
226. RRB NTPC 2021
Q. CI ON ₹5000 AT 5% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × (1.05)² = 5000 × 1.1025 = ₹5512.5 → CI = ₹512.5
ANSWER: ₹512.50
227. NDA 2022
Q. A SUM BECOMES ₹5832 IN 2 YEARS AT 8% CI. FIND PRINCIPAL.
SOLUTION:
P = 5832 / (1.08)² = 5832 / 1.1664 = ₹5000
ANSWER: ₹5000
228. SSC MTS 2022
Q. FIND THE SI ON ₹4800 FOR 2 YEARS AT 7.5% P.A.
SOLUTION:
SI = (4800 × 7.5 × 2)/100 = ₹720
ANSWER: ₹720
229. IBPS RRB PO 2020
Q. FIND CI ON ₹8000 FOR 2 YEARS AT 7% COMPOUNDED YEARLY.
SOLUTION:
A = 8000 × (1.07)² = 8000 × 1.1449 = ₹9159.2 → CI = ₹1159.2
ANSWER: ₹1159.20
230. SSC CGL TIER-II 2021
Q. ₹12000 BECOMES ₹15120 IN 2 YEARS. FIND CI RATE.
SOLUTION:
A/P = 1.26 → √1.26 ≈ 1.122 → R ≈ 12.2%
ANSWER: 12.2%
231. SBI CLERK 2022
Q. SI ON ₹5600 FOR 3 YEARS AT 6.5%?
SOLUTION:
SI = (5600 × 6.5 × 3)/100 = ₹1092
ANSWER: ₹1092
232. SSC JE 2020
Q. A SUM BECOMES ₹13225 IN 2 YEARS AT CI OF 15%. FIND PRINCIPAL.
SOLUTION:
P = 13225 / (1.15)² = 13225 / 1.3225 = ₹10000
ANSWER: ₹10000
233. IBPS SO 2021
Q. FIND CI ON ₹7000 FOR 2 YEARS AT 10% COMPOUNDED HALF-YEARLY.
SOLUTION:
N = 4, R = 5%; A = 7000 × (1.05)^4 = 7000 × 1.2155 = ₹8508.5 → CI = ₹1508.5
ANSWER: ₹1508.50
234. SSC GD 2021
Q. SI ON ₹3000 AT 6% FOR 4 YEARS?
SOLUTION:
SI = (3000 × 6 × 4)/100 = ₹720
ANSWER: ₹720
235. NDA 2017
Q. A SUM BECOMES ₹11025 IN 2 YEARS AT 5% CI. FIND PRINCIPAL.
SOLUTION:
P = 11025 / 1.1025 = ₹10000
ANSWER: ₹10000
236. IBPS CLERK 2021
Q. CI ON ₹9600 AT 6.25% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 9600 × (1.0625)² = 9600 × 1.1289 = ₹10837.44 → CI = ₹1237.44
ANSWER: ₹1237.44
237. SSC MTS 2021
Q. SI ON ₹8400 AT 4% FOR 2 YEARS?
SOLUTION:
SI = (8400 × 4 × 2)/100 = ₹672
ANSWER: ₹672
238. IBPS PO 2022
Q. FIND CI ON ₹11000 FOR 2 YEARS AT 5% COMPOUNDED ANNUALLY.
SOLUTION:
A = 11000 × (1.05)² = 11000 × 1.1025 = ₹12127.5 → CI = ₹1127.5
ANSWER: ₹1127.50
239. SSC JE 2022
Q. SI ON ₹9600 AT 6% FOR 2.5 YEARS?
SOLUTION:
SI = (9600 × 6 × 2.5)/100 = ₹1440
ANSWER: ₹1440
240. CDS 2022
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND INTEREST.
SOLUTION:
P = 12100 / 1.21 = ₹10000 → CI = ₹2100
ANSWER: ₹2100
241. SSC CGL TIER-II 2014
Q. SI ON ₹5000 AT 8% P.A. FOR 3 YEARS?
SOLUTION:
SI = (5000 × 8 × 3)/100 = ₹1200
ANSWER: ₹1200
242. IBPS PO 2014
Q. CI ON ₹10000 AT 10% P.A. FOR 2 YEARS?
SOLUTION:
A = 10000 × (1.10)² = 10000 × 1.21 = ₹12100 → CI = ₹2100
ANSWER: ₹2100
243. SSC CHSL 2015
Q. A SUM BECOMES ₹8000 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 8000 / 1.21 = ₹6611.57
ANSWER: ₹6611.57
244. IBPS RRB CLERK 2016
Q. SI ON ₹7500 FOR 3 YEARS AT 5.5%?
SOLUTION:
SI = (7500 × 5.5 × 3)/100 = ₹1237.50
ANSWER: ₹1237.50
245. SSC GD 2014
Q. CI ON ₹6000 AT 5% FOR 2 YEARS?
SOLUTION:
A = 6000 × 1.1025 = ₹6615 → CI = ₹615
ANSWER: ₹615
246. SBI PO 2015
Q. A SUM AMOUNTS TO ₹12100 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 12100 / 1.21 = ₹10000
ANSWER: ₹10000
247. RRB ALP 2016
Q. SI ON ₹4000 AT 6% FOR 4 YEARS?
SOLUTION:
SI = (4000 × 6 × 4)/100 = ₹960
ANSWER: ₹960
248. NDA 2014
Q. A SUM BECOMES DOUBLE IN 20 YEARS AT SI. FIND RATE.
SOLUTION:
SI = P → R = (100 × 1)/20 = 5%
ANSWER: 5%
249. SSC JE 2015
Q. CI ON ₹8000 AT 8% FOR 2 YEARS?
SOLUTION:
A = 8000 × (1.08)² = 8000 × 1.1664 = ₹9331.2 → CI = ₹1331.2
ANSWER: ₹1331.20
250. IBPS SO 2016
Q. FIND SI ON ₹9200 AT 7.5% FOR 2 YEARS.
SOLUTION:
SI = (9200 × 7.5 × 2)/100 = ₹1380
ANSWER: ₹1380
251. SSC CGL 2016
Q. A SUM BECOMES ₹9261 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 9261 / 1.21 = ₹7650
ANSWER: ₹7650
252. IBPS CLERK 2015
Q. CI ON ₹10000 AT 8% FOR 2 YEARS?
SOLUTION:
A = 10000 × 1.1664 = ₹11664 → CI = ₹1664
ANSWER: ₹1664
253. SSC MTS 2014
Q. SI ON ₹5400 FOR 2 YEARS AT 6.25%?
SOLUTION:
SI = (5400 × 6.25 × 2)/100 = ₹675
ANSWER: ₹675
254. SBI CLERK 2016
Q. ₹9600 BECOMES ₹11289.6 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 1.176 → √ = 1.08 → R = 8%
ANSWER: 8%
255. RRB NTPC 2015
Q. SI ON ₹8400 AT 9% FOR 2 YEARS?
SOLUTION:
SI = (8400 × 9 × 2)/100 = ₹1512
ANSWER: ₹1512
256. NDA 2016
Q. CI ON ₹12000 AT 6% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 12000 × 1.1236 = ₹13483.2 → CI = ₹1483.2
ANSWER: ₹1483.20
257. IBPS PO 2015
Q. FIND SI ON ₹10500 FOR 3 YEARS AT 4.5% P.A.
SOLUTION:
SI = (10500 × 4.5 × 3)/100 = ₹1417.50
ANSWER: ₹1417.50
258. SSC CHSL 2014
Q. A SUM BECOMES ₹8820 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 8820 / 1.21 = ₹7289.26
ANSWER: ₹7289.26
259. RRB JE 2015
Q. CI ON ₹15000 AT 5% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 15000 × (1.05)² = ₹15000 × 1.1025 = ₹16537.5 → CI = ₹1537.5
ANSWER: ₹1537.50
260. CDS 2016
Q. SI ON ₹5000 AT 6.5% FOR 3 YEARS?
SOLUTION:
SI = (5000 × 6.5 × 3)/100 = ₹975
ANSWER: ₹975
261. SSC CGL 2015
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND THE INTEREST EARNED.
SOLUTION:
A = ₹12100; P = 12100 / 1.21 = ₹10000 → CI = ₹2100
ANSWER: ₹2100
262. IBPS CLERK 2014
Q. FIND SI ON ₹6400 AT 6.25% FOR 2 YEARS.
SOLUTION:
SI = (6400 × 6.25 × 2)/100 = ₹800
ANSWER: ₹800
263. SSC CHSL 2014
Q. CI ON ₹7000 AT 5% P.A. FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 7000 × 1.1025 = ₹7717.5 → CI = ₹717.5
ANSWER: ₹717.50
264. SBI PO 2016
Q. ₹10000 BECOMES ₹12100 IN 2 YEARS AT CI. WHAT IS THE RATE?
SOLUTION:
A = P × (1 + R/100)² → 12100 = 10000 × (1 + R/100)²
⇒ R = 10%
ANSWER: 10%
265. RRB ALP 2015
Q. SI ON ₹4800 FOR 2 YEARS AT 7.5%?
SOLUTION:
SI = (4800 × 7.5 × 2)/100 = ₹720
ANSWER: ₹720
266. NDA 2015
Q. A SUM TRIPLES IN 20 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
SI = 2P → R = (100 × 2)/20 = 10%
ANSWER: 10%
267. SSC JE 2014
Q. CI ON ₹8000 AT 8% FOR 2 YEARS?
SOLUTION:
A = 8000 × (1.08)² = 8000 × 1.1664 = ₹9331.2 → CI = ₹1331.2
ANSWER: ₹1331.20
268. IBPS RRB CLERK 2016
Q. SI ON ₹7500 AT 5.5% FOR 2 YEARS?
SOLUTION:
SI = (7500 × 5.5 × 2)/100 = ₹825
ANSWER: ₹825
269. SSC MTS 2015
Q. SI ON ₹4000 AT 5% P.A. FOR 4 YEARS?
SOLUTION:
SI = (4000 × 5 × 4)/100 = ₹800
ANSWER: ₹800
270. SBI CLERK 2014
Q. FIND CI ON ₹5000 FOR 2 YEARS AT 10% P.A., COMPOUNDED ANNUALLY.
SOLUTION:
A = 5000 × 1.21 = ₹6050 → CI = ₹1050
ANSWER: ₹1050
271. RRB JE 2016
Q. A SUM BECOMES ₹8820 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 8820 / 1.21 = ₹7289.26
ANSWER: ₹7289.26
272. SSC GD 2015
Q. SI ON ₹6400 AT 8% P.A. FOR 2 YEARS?
SOLUTION:
SI = (6400 × 8 × 2)/100 = ₹1024
ANSWER: ₹1024
273. IBPS PO 2016
Q. A SUM AMOUNTS TO ₹15125 IN 2 YEARS AT 10% CI. FIND CI.
SOLUTION:
P = 15125 / 1.21 = ₹12500 → CI = ₹2625
ANSWER: ₹2625
274. SSC CGL TIER-I 2014
Q. FIND SI ON ₹8500 AT 4% FOR 3 YEARS.
SOLUTION:
SI = (8500 × 4 × 3)/100 = ₹1020
ANSWER: ₹1020
275. NDA 2016
Q. CI ON ₹6000 FOR 2 YEARS AT 10% P.A.?
SOLUTION:
A = 6000 × 1.21 = ₹7260 → CI = ₹1260
ANSWER: ₹1260
276. IBPS SO 2015
Q. SI ON ₹10500 AT 6% P.A. FOR 2.5 YEARS?
SOLUTION:
SI = (10500 × 6 × 2.5)/100 = ₹1575
ANSWER: ₹1575
277. SSC CHSL 2015
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT 10% CI. FIND INTEREST EARNED.
SOLUTION:
P = ₹12000 → CI = ₹2520
ANSWER: ₹2520
278. IBPS CLERK 2014
Q. CI ON ₹4000 AT 12% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 4000 × (1.12)² = 4000 × 1.2544 = ₹5017.6 → CI = ₹1017.6
ANSWER: ₹1017.60
279. SSC JE 2016
Q. SI ON ₹6000 AT 6% FOR 3 YEARS?
SOLUTION:
SI = (6000 × 6 × 3)/100 = ₹1080
ANSWER: ₹1080
280. SBI PO 2014
Q. A SUM BECOMES ₹9680 IN 2 YEARS AT CI OF 10%. FIND INTEREST.
SOLUTION:
P = 9680 / 1.21 = ₹8000 → CI = ₹1680
ANSWER: ₹1680
281. SSC CGL 2013
Q. FIND SI ON ₹6000 FOR 2 YEARS AT 6.5% P.A.
SOLUTION:
SI = (6000 × 6.5 × 2)/100 = ₹780
ANSWER: ₹780
282. IBPS PO 2013
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND INTEREST.
SOLUTION:
P = 12100 / 1.21 = ₹10000 → CI = ₹2100
ANSWER: ₹2100
283. SSC CHSL 2012
Q. A SUM TRIPLES IN 10 YEARS UNDER SI. FIND RATE.
SOLUTION:
SI = 2P → R = 200/10 = 20%
ANSWER: 20%
284. SBI CLERK 2013
Q. CI ON ₹5000 AT 10% FOR 2 YEARS?
SOLUTION:
A = 5000 × 1.21 = ₹6050 → CI = ₹1050
✅ANSWER: ₹1050
285. SSC GD 2011
Q. SI ON ₹4000 FOR 4 YEARS AT 6%?
SOLUTION:
SI = (4000 × 6 × 4)/100 = ₹960
ANSWER: ₹960
286. RRB ALP 2012
Q. CI ON ₹8000 AT 8% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 8000 × (1.08)² = 8000 × 1.1664 = ₹9331.2 → CI = ₹1331.2
ANSWER: ₹1331.20
287. SSC JE 2013
Q. FIND SI ON ₹7500 AT 7.5% P.A. FOR 3 YEARS.
SOLUTION:
SI = (7500 × 7.5 × 3)/100 = ₹1687.50
ANSWER: ₹1687.50
288. NDA 2012
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND THE RATE.
SOLUTION:
A = P × (1 + R/100)² → R = 10%
ANSWER: 10%
289. IBPS CLERK 2011
Q. SI ON ₹5600 AT 5% FOR 2 YEARS?
SOLUTION:
SI = (5600 × 5 × 2)/100 = ₹560
ANSWER: ₹560
290. SSC MTS 2013
Q. CI ON ₹4000 FOR 2 YEARS AT 10% P.A.?
SOLUTION:
A = 4000 × 1.21 = ₹4840 → CI = ₹840
ANSWER: ₹840
291. SBI PO 2012
Q. FIND CI ON ₹10000 AT 8% FOR 2 YEARS COMPOUNDED ANNUALLY.
SOLUTION:
A = 10000 × 1.1664 = ₹11664 → CI = ₹1664
ANSWER: ₹1664
292. SSC CGL 2012
Q. SI ON ₹8400 AT 4% FOR 3 YEARS?
SOLUTION:
SI = (8400 × 4 × 3)/100 = ₹1008
ANSWER: ₹1008
293. IBPS SO 2013
Q. A SUM BECOMES ₹9680 IN 2 YEARS AT 10% CI. FIND INTEREST EARNED.
SOLUTION:
P = 9680 / 1.21 = ₹8000 → CI = ₹1680
ANSWER: ₹1680
294. SSC JE 2012
Q. SI ON ₹10000 AT 9% FOR 2 YEARS?
SOLUTION:
SI = (10000 × 9 × 2)/100 = ₹1800
ANSWER: ₹1800
295. SBI CLERK 2011
Q. CI ON ₹15000 AT 6% FOR 2 YEARS?
SOLUTION:
A = 15000 × (1.06)² = 15000 × 1.1236 = ₹16854 → CI = ₹1854
ANSWER: ₹1854
296. SSC CHSL 2011
Q. A SUM BECOMES ₹11250 IN 2 YEARS AT 12.5% CI. FIND P.
SOLUTION:
P = 11250 / (1.125)² = 11250 / 1.265625 = ₹8888.89
ANSWER: ₹8888.89
297. IBPS RRB CLERK 2013
Q. SI ON ₹7000 AT 6% P.A. FOR 2.5 YEARS?
SOLUTION:
SI = (7000 × 6 × 2.5)/100 = ₹1050
ANSWER: ₹1050
298. RRB JE 2011
Q. CI ON ₹2000 FOR 2 YEARS AT 5% P.A.?
SOLUTION:
A = 2000 × 1.1025 = ₹2205 → CI = ₹205
ANSWER: ₹205
299. NDA 2011
Q. A SUM DOUBLES IN 10 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
R = 100/10 = 10%
ANSWER: 10%
300. SSC MTS 2012
Q. SI ON ₹8500 AT 5% FOR 4 YEARS?
SOLUTION:
SI = (8500 × 5 × 4)/100 = ₹1700
ANSWER: ₹1700
301. SSC CGL 2011
Q. A SUM OF ₹9000 BECOMES ₹10890 IN 2 YEARS AT CI. FIND THE RATE.
SOLUTION:
A/P = 1.21 → √1.21 = 1.10 → R = 10%
ANSWER: 10%
302. IBPS PO 2012
Q. SI ON ₹8500 FOR 3 YEARS AT 8% P.A.?
SOLUTION:
SI = (8500 × 8 × 3)/100 = ₹2040
ANSWER: ₹2040
303. SSC CHSL 2010
Q. CI ON ₹6400 FOR 2 YEARS AT 10%?
SOLUTION:
A = 6400 × 1.21 = ₹7744 → CI = ₹1344
ANSWER: ₹1344
304. SBI CLERK 2013
Q. FIND SI ON ₹5000 FOR 2.5 YEARS AT 6% P.A.
SOLUTION:
SI = (5000 × 6 × 2.5)/100 = ₹750
ANSWER: ₹750
305. RRB ALP 2011
Q. CI ON ₹8000 AT 12% P.A. FOR 2 YEARS?
SOLUTION:
A = 8000 × (1.12)² = 8000 × 1.2544 = ₹10035.2 → CI = ₹2035.2
ANSWER: ₹2035.20
306. SSC MTS 2012
Q. SI ON ₹6000 AT 9% FOR 2 YEARS?
SOLUTION:
SI = (6000 × 9 × 2)/100 = ₹1080
ANSWER: ₹1080
307. IBPS RRB CLERK 2012
Q. A SUM BECOMES ₹11236 IN 2 YEARS AT 6% CI. FIND P.
SOLUTION:
A = P(1.06)² = P × 1.1236 → P = 11236 / 1.1236 = ₹10000
ANSWER: ₹10000
308. SSC JE 2010
Q. CI ON ₹9000 FOR 2 YEARS AT 10%?
SOLUTION:
A = 9000 × 1.21 = ₹10890 → CI = ₹1890
ANSWER: ₹1890
309. SBI PO 2011
Q. SI ON ₹7800 FOR 4 YEARS AT 7.5%?
SOLUTION:
SI = (7800 × 7.5 × 4)/100 = ₹2340
ANSWER: ₹2340
310. NDA 2010
Q. A SUM BECOMES DOUBLE IN 16 YEARS AT SI. FIND RATE.
SOLUTION:
R = 100/16 = 6.25%
ANSWER: 6.25%
311. IBPS CLERK 2011
Q. FIND CI ON ₹5000 FOR 2 YEARS AT 5%?
SOLUTION:
A = 5000 × 1.1025 = ₹5512.5 → CI = ₹512.5
ANSWER: ₹512.50
312. SSC CGL 2009
Q. SI ON ₹6000 FOR 3 YEARS AT 6%?
SOLUTION:
SI = (6000 × 6 × 3)/100 = ₹1080
ANSWER: ₹1080
313. IBPS PO 2010
Q. A SUM OF ₹4000 BECOMES ₹4840 IN 2 YEARS AT CI. FIND RATE.
SOLUTION:
A/P = 1.21 → √1.21 = 1.10 → R = 10%
ANSWER: 10%
314. SSC CHSL 2008
Q. SI ON ₹5000 AT 5.5% P.A. FOR 4 YEARS?
SOLUTION:
SI = (5000 × 5.5 × 4)/100 = ₹1100
ANSWER: ₹1100
315. SBI CLERK 2012
Q. CI ON ₹10000 AT 10% P.A. FOR 2 YEARS?
SOLUTION:
A = 10000 × 1.21 = ₹12100 → CI = ₹2100
ANSWER: ₹2100
316. RRB NTPC 2010
Q. SI ON ₹8400 FOR 2 YEARS AT 6%?
SOLUTION:
SI = (8400 × 6 × 2)/100 = ₹1008
ANSWER: ₹1008
317. SSC GD 2011
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT 10% CI. FIND CI.
SOLUTION:
P = 14520 / 1.21 = ₹12000 → CI = ₹2520
ANSWER: ₹2520
318. IBPS SO 2011
Q. FIND SI ON ₹7500 AT 6.5% FOR 3 YEARS.
SOLUTION:
SI = (7500 × 6.5 × 3)/100 = ₹1462.5
ANSWER: ₹1462.50
319. SSC JE 2011
Q. CI ON ₹10000 FOR 2 YEARS AT 7%?
SOLUTION:
A = 10000 × 1.1449 = ₹11449 → CI = ₹1449
ANSWER: ₹1449
320. SBI PO 2010
Q. A SUM BECOMES ₹15125 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 15125 / 1.21 = ₹12500
ANSWER: ₹12500
321. SSC CGL 2009
Q. FIND CI ON ₹5000 FOR 2 YEARS AT 6% P.A. COMPOUNDED ANNUALLY.
SOLUTION:
A = 5000 × (1.06)² = 5000 × 1.1236 = ₹5618 → CI = ₹618
ANSWER: ₹618
322. NDA 2008
Q. A SUM DOUBLES IN 8 YEARS UNDER SI. WHAT IS THE RATE?
SOLUTION:
R = 100/8 = 12.5%
ANSWER: 12.5%
323. IBPS CLERK 2010
Q. SI ON ₹4500 FOR 3 YEARS AT 9%?
SOLUTION:
SI = (4500 × 9 × 3)/100 = ₹1215
ANSWER: ₹1215
324. SSC MTS 2009
Q. A SUM BECOMES ₹9261 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 9261 / 1.21 = ₹7650
ANSWER: ₹7650
325. SBI PO 2008
Q. CI ON ₹8000 AT 7% FOR 2 YEARS?
SOLUTION:
A = 8000 × (1.07)² = 8000 × 1.1449 = ₹9159.20 → CI = ₹1159.20
ANSWER: ₹1159.20
326. RRB JE 2009
Q. FIND SI ON ₹6000 AT 5% FOR 4 YEARS.
SOLUTION:
SI = (6000 × 5 × 4)/100 = ₹1200
ANSWER: ₹1200
327. SSC CHSL 2007
Q. A SUM BECOMES ₹2420 IN 2 YEARS AT 10% CI. FIND THE PRINCIPAL.
SOLUTION:
P = 2420 / 1.21 = ₹2000
ANSWER: ₹2000
328. IBPS RRB 2008
Q. CI ON ₹10000 AT 8% FOR 2 YEARS?
SOLUTION:
A = 10000 × 1.1664 = ₹11664 → CI = ₹1664
ANSWER: ₹1664
329. SSC JE 2006
Q. SI ON ₹7500 AT 6.5% FOR 2 YEARS?
SOLUTION:
SI = (7500 × 6.5 × 2)/100 = ₹975
ANSWER: ₹975
330. NDA 2009
Q. A SUM TRIPLES IN 16 YEARS AT SI. FIND THE RATE.
SOLUTION:
SI = 2P → R = 200/16 = 12.5%
ANSWER: 12.5%
331. SBI CLERK 2009
Q. CI ON ₹12000 FOR 2 YEARS AT 5%?
SOLUTION:
A = 12000 × 1.1025 = ₹13230 → CI = ₹1230
ANSWER: ₹1230
332. SSC GD 2008
Q. SI ON ₹5000 AT 8% FOR 2.5 YEARS?
SOLUTION:
SI = (5000 × 8 × 2.5)/100 = ₹1000
ANSWER: ₹1000
333. IBPS SO 2009
Q. CI ON ₹4000 AT 10% P.A. FOR 2 YEARS?
SOLUTION:
A = 4000 × 1.21 = ₹4840 → CI = ₹840
ANSWER: ₹840
334. SSC CGL 2007
Q. SI ON ₹9600 AT 7.5% FOR 3 YEARS?
SOLUTION:
SI = (9600 × 7.5 × 3)/100 = ₹2160
ANSWER: ₹2160
335. NDA 2007
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT 10% CI. FIND INTEREST EARNED.
SOLUTION:
P = 14520 / 1.21 = ₹12000 → CI = ₹2520
ANSWER: ₹2520
336. RRB ALP 2008
Q. CI ON ₹7000 AT 5% FOR 2 YEARS?
SOLUTION:
A = 7000 × 1.1025 = ₹7717.50 → CI = ₹717.50
ANSWER: ₹717.50
337. SSC JE 2007
Q. FIND SI ON ₹6400 AT 6% FOR 4 YEARS.
SOLUTION:
SI = (6400 × 6 × 4)/100 = ₹1536
ANSWER: ₹1536
338. IBPS PO 2009
Q. CI ON ₹5000 AT 4% FOR 2 YEARS COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × (1.04)² = 5000 × 1.0816 = ₹5408 → CI = ₹408
ANSWER: ₹408
339. SSC CHSL 2008
Q. SI ON ₹3000 AT 9% FOR 3 YEARS?
SOLUTION:
SI = (3000 × 9 × 3)/100 = ₹810
ANSWER: ₹810
340. SBI PO 2007
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT CI OF 10%. FIND PRINCIPAL.
SOLUTION:
P = 12100 / 1.21 = ₹10000
ANSWER: ₹10000
341. SSC CGL 2006
Q. FIND SI ON ₹7500 FOR 3 YEARS AT 6% P.A.
SOLUTION:
SI = (7500 × 6 × 3)/100 = ₹1350
ANSWER: ₹1350
342. NDA 2006
Q. A SUM BECOMES ₹4840 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 4840 / 1.21 = ₹4000
ANSWER: ₹4000
343. IBPS CLERK 2007
Q. CI ON ₹6000 AT 5% FOR 2 YEARS?
SOLUTION:
A = 6000 × 1.1025 = ₹6615 → CI = ₹615
ANSWER: ₹615
344. SBI CLERK 2006
Q. SI ON ₹4000 AT 9% P.A. FOR 3 YEARS?
SOLUTION:
SI = (4000 × 9 × 3)/100 = ₹1080
ANSWER: ₹1080
345. SSC JE 2005
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND CI.
SOLUTION:
P = ₹10000 → CI = ₹2100
ANSWER: ₹2100
346. RRB JE 2007
Q. CI ON ₹9000 AT 8% P.A. FOR 2 YEARS?
SOLUTION:
A = 9000 × 1.1664 = ₹10497.6 → CI = ₹1497.6
ANSWER: ₹1497.60
347. NDA 2005
Q. A SUM DOUBLES IN 10 YEARS AT SI. WHAT IS THE RATE?
SOLUTION:
R = 100/10 = 10%
ANSWER: 10%
348. SSC CHSL 2004
Q. FIND SI ON ₹6000 AT 4% P.A. FOR 2.5 YEARS.
SOLUTION:
SI = (6000 × 4 × 2.5)/100 = ₹600
ANSWER: ₹600
349. IBPS PO 2006
Q. CI ON ₹5000 AT 12% FOR 2 YEARS?
SOLUTION:
A = 5000 × (1.12)² = 5000 × 1.2544 = ₹6272 → CI = ₹1272
ANSWER: ₹1272
350. SSC MTS 2005
Q. SI ON ₹4500 AT 7.5% P.A. FOR 4 YEARS?
SOLUTION:
SI = (4500 × 7.5 × 4)/100 = ₹1350
ANSWER: ₹1350
351. SBI PO 2005
Q. A SUM BECOMES ₹10500 IN 2 YEARS AT 5% CI. FIND CI.
SOLUTION:
P = 10500 / (1.05)² = 10500 / 1.1025 = ₹9523.80 → CI = ₹976.20
ANSWER: ₹976.20
352. SSC GD 2004
Q. SI ON ₹2000 AT 6% P.A. FOR 3 YEARS?
SOLUTION:
SI = (2000 × 6 × 3)/100 = ₹360
ANSWER: ₹360
353. RRB ALP 2006
Q. FIND CI ON ₹4000 FOR 2 YEARS AT 5%?
SOLUTION:
A = 4000 × 1.1025 = ₹4410 → CI = ₹410
ANSWER: ₹410
354. NDA 2004
Q. A SUM BECOMES ₹8000 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 8000 / 1.21 = ₹6611.57
ANSWER: ₹6611.57
355. SSC CGL 2003
Q. SI ON ₹8500 FOR 2 YEARS AT 5%?
SOLUTION:
SI = (8500 × 5 × 2)/100 = ₹850
ANSWER: ₹850
356. IBPS CLERK 2005
Q. CI ON ₹3000 AT 10% FOR 2 YEARS?
SOLUTION:
A = 3000 × 1.21 = ₹3630 → CI = ₹630
ANSWER: ₹630
357. SSC JE 2002
Q. A SUM BECOMES ₹11664 IN 2 YEARS AT 8% CI. FIND PRINCIPAL.
SOLUTION:
P = 11664 / 1.1664 = ₹10000
ANSWER: ₹10000
CLICK TO APPLY:
Click the application link below:
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358. SBI CLERK 2003
Q. SI ON ₹7000 FOR 5 YEARS AT 6%?
SOLUTION:
SI = (7000 × 6 × 5)/100 = ₹2100
ANSWER: ₹2100
359. SSC CHSL 2002
Q. A SUM BECOMES ₹4840 IN 2 YEARS AT CI OF 10%. FIND INTEREST.
SOLUTION:
P = 4000 → CI = 4840 – 4000 = ₹840
ANSWER: ₹840
360. NDA 2003
Q. A SUM BECOMES ₹15125 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 15125 / 1.21 = ₹12500
ANSWER: ₹12500
361. SSC CGL 2000
Q. A SUM BECOMES ₹4840 IN 2 YEARS AT 10% CI ANNUALLY. FIND THE PRINCIPAL.
SOLUTION:
A = P(1.10)² → P = 4840 / 1.21 = ₹4000
ANSWER: ₹4000
362. NDA 1999
Q. A SUM TRIPLES IN 20 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
SI = 2P → R = (100 × 2)/20 = 10%
ANSWER: 10%
363. SBI CLERK 2000
Q. FIND CI ON ₹6000 AT 10% P.A. COMPOUNDED ANNUALLY FOR 2 YEARS.
SOLUTION:
A = 6000 × 1.21 = ₹7260 → CI = ₹1260
ANSWER: ₹1260
364. RRB JE 1999
Q. SI ON ₹5000 FOR 3 YEARS AT 5%?
SOLUTION:
SI = (5000 × 5 × 3)/100 = ₹750
ANSWER: ₹750
365. LIC AAO 2000
Q. A SUM BECOMES ₹12100 IN 2 YEARS AT 10% CI. FIND THE INTEREST.
SOLUTION:
P = ₹10000 → CI = ₹2100
ANSWER: ₹2100
366. SSC MTS 1998
Q. SI ON ₹4000 FOR 4 YEARS AT 5%?
SOLUTION:
SI = (4000 × 5 × 4)/100 = ₹800
ANSWER: ₹800
367. NDA 2000
Q. A SUM BECOMES ₹6600 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 6600 / 1.21 = ₹5454.55
ANSWER: ₹5454.55
368. SBI PO 1999
Q. CI ON ₹8000 AT 12% FOR 2 YEARS?
SOLUTION:
A = 8000 × 1.2544 = ₹10035.2 → CI = ₹2035.20
ANSWER: ₹2035.20
369. RRB NTPC 1999
Q. SI ON ₹7000 FOR 2.5 YEARS AT 8%?
SOLUTION:
SI = (7000 × 8 × 2.5)/100 = ₹1400
ANSWER: ₹1400
370. SSC JE 1997
Q. CI ON ₹5000 FOR 2 YEARS AT 6% COMPOUNDED ANNUALLY?
SOLUTION:
A = 5000 × 1.1236 = ₹5618 → CI = ₹618
ANSWER: ₹618
371. IBPS CLERK 1998
Q. A SUM DOUBLES IN 10 YEARS AT SI. FIND THE RATE.
SOLUTION:
R = 100/10 = 10%
ANSWER: 10%
372. NDA 1998
Q. CI ON ₹10000 FOR 2 YEARS AT 5% P.A.?
SOLUTION:
A = 10000 × 1.1025 = ₹11025 → CI = ₹1025
ANSWER: ₹1025
373. SSC CHSL 1996
Q. FIND SI ON ₹9000 FOR 3 YEARS AT 4.5% P.A.
SOLUTION:
SI = (9000 × 4.5 × 3)/100 = ₹1215
ANSWER: ₹1215
CLICK TO APPLY:
Click the application link below:
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374. SBI CLERK 1997
Q. CI ON ₹6000 AT 6% FOR 2 YEARS?
SOLUTION:
A = 6000 × 1.1236 = ₹6741.6 → CI = ₹741.6
ANSWER: ₹741.60
375. RRB JE 1996
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT 10% CI. FIND P.
SOLUTION:
P = 6050 / 1.21 = ₹5000
ANSWER: ₹5000
376. LIC ASSISTANT 1995
Q. SI ON ₹7500 FOR 4 YEARS AT 7% P.A.?
SOLUTION:
SI = (7500 × 7 × 4)/100 = ₹2100
ANSWER: ₹2100
377. SSC GD 1995
Q. CI ON ₹4000 FOR 2 YEARS AT 8%?
SOLUTION:
A = 4000 × 1.1664 = ₹4665.60 → CI = ₹665.60
ANSWER: ₹665.60
378. SBI PO 1996
Q. A SUM BECOMES ₹9680 IN 2 YEARS AT 10% CI. WHAT IS THE INTEREST?
SOLUTION:
P = 9680 / 1.21 = ₹8000 → CI = ₹1680
ANSWER: ₹1680
379. RRB ALP 1995
Q. SI ON ₹3000 AT 6% P.A. FOR 2.5 YEARS?
SOLUTION:
SI = (3000 × 6 × 2.5)/100 = ₹450
ANSWER: ₹450
380. NDA 1997
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT 10% CI. WHAT IS THE INTEREST EARNED?
SOLUTION:
P = ₹12000 → CI = ₹2520
ANSWER: ₹2520
381. SSC CGL 1995
Q. SI ON ₹4000 AT 5% P.A. FOR 3 YEARS?
SOLUTION:
SI = (4000 × 5 × 3)/100 = ₹600
ANSWER: ₹600
382. NDA 1994
Q. A SUM BECOMES ₹6050 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 6050 / 1.21 = ₹5000
ANSWER: ₹5000
383. SBI CLERK 1993
Q. CI ON ₹5000 FOR 2 YEARS AT 6% P.A.?
SOLUTION:
A = 5000 × 1.1236 = ₹5618 → CI = ₹618
ANSWER: ₹618
384. RRB JE 1994
Q. SI ON ₹7500 AT 4% FOR 2 YEARS?
SOLUTION:
SI = (7500 × 4 × 2)/100 = ₹600
ANSWER: ₹600
385. SSC JE 1992
Q. A SUM BECOMES ₹9680 IN 2 YEARS AT 10% CI. WHAT IS THE INTEREST?
SOLUTION:
P = 9680 / 1.21 = ₹8000 → CI = ₹1680
ANSWER: ₹1680
386. NDA 1993
Q. A SUM TRIPLES IN 24 YEARS UNDER SI. FIND THE RATE.
SOLUTION:
SI = 2P → R = 200/24 = 8.33%
ANSWER: 8.33%
387. SBI PO 1994
Q. CI ON ₹6000 FOR 2 YEARS AT 12%?
SOLUTION:
A = 6000 × 1.2544 = ₹7526.4 → CI = ₹1526.4
ANSWER: ₹1526.40
388. RRB NTPC 1992
Q. SI ON ₹3000 AT 7% FOR 5 YEARS?
SOLUTION:
SI = (3000 × 7 × 5)/100 = ₹1050
ANSWER: ₹1050
389. LIC AAO 1993
Q. CI ON ₹10000 FOR 2 YEARS AT 10% P.A. COMPOUNDED YEARLY?
SOLUTION:
A = 10000 × 1.21 = ₹12100 → CI = ₹2100
ANSWER: ₹2100
390. SSC CHSL 1991
Q. A SUM BECOMES ₹4840 IN 2 YEARS AT 10% CI. FIND CI.
SOLUTION:
P = ₹4000 → CI = ₹4840 – ₹4000 = ₹840
ANSWER: ₹840
391. NDA 1992
Q. A SUM BECOMES ₹14520 IN 2 YEARS AT CI OF 10%. WHAT IS INTEREST?
SOLUTION:
P = ₹12000 → CI = ₹2520
ANSWER: ₹2520
392. SBI CLERK 1992
Q. SI ON ₹9000 AT 6% FOR 3 YEARS?
SOLUTION:
SI = (9000 × 6 × 3)/100 = ₹1620
ANSWER: ₹1620
393. SSC JE 1990
Q. CI ON ₹5000 AT 10% FOR 2 YEARS?
SOLUTION:
A = 5000 × 1.21 = ₹6050 → CI = ₹1050
ANSWER: ₹1050
394. RRB ALP 1991
Q. SI ON ₹2000 AT 5% FOR 4 YEARS?
SOLUTION:
SI = (2000 × 5 × 4)/100 = ₹400
ANSWER: ₹400
395. NDA 1991
Q. A SUM DOUBLES IN 10 YEARS AT SI. FIND THE INTEREST RATE.
SOLUTION:
R = 100/10 = 10%
ANSWER: 10%
396. SBI PO 1990
Q. CI ON ₹7000 AT 6% FOR 2 YEARS?
SOLUTION:
A = 7000 × 1.1236 = ₹7865.20 → CI = ₹865.20
ANSWER: ₹865.20
397. RRB NTPC 1990
Q. SI ON ₹6000 FOR 2.5 YEARS AT 8%?
SOLUTION:
SI = (6000 × 8 × 2.5)/100 = ₹1200
ANSWER: ₹1200
398. SSC MTS 1989
Q. SI ON ₹5000 AT 5% FOR 4 YEARS?
SOLUTION:
SI = (5000 × 5 × 4)/100 = ₹1000
ANSWER: ₹1000
399. NDA 1989
Q. A SUM BECOMES ₹13225 IN 2 YEARS AT 10% CI. FIND PRINCIPAL.
SOLUTION:
P = 13225 / 1.21 = ₹10933.88
ANSWER: ₹10933.88
400. SBI CLERK 1988
Q. CI ON ₹8000 AT 10% FOR 2 YEARS?
SOLUTION:
A = 8000 × 1.21 = ₹9680 → CI = ₹1680
ANSWER: ₹1680
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