Compound Interest is an important topic in Quantitative Aptitude and is frequently asked in competitive examinations such as SSC, Railway, Banking, Defence, Police and other government exams. Unlike simple interest, compound interest is calculated on the principal as well as the interest accumulated in previous periods.
This practice set contains 100+ important Compound Interest questions with answers and explanations. It covers annual compounding, half-yearly and quarterly compounding, amount, rate, time, principal, difference between compound interest and simple interest, and other commonly asked problems.
Try to solve each question yourself before clicking on View Answer. Regular practice will help improve your calculation speed, accuracy and confidence in solving Compound Interest problems.
Q1. What is the compound interest on ₹5,000 at 10% per annum for 2 years?
A. ₹1,000
B. ₹1,050
C. ₹1,100
D. ₹1,200
View Answer
Amount = 5000 × (1.10)² = ₹6,050.
Compound Interest = ₹6,050 − ₹5,000 = ₹1,050.
Q2. Find the amount on ₹8,000 at 5% compound interest per annum for 2 years.
A. ₹8,800
B. ₹8,820
C. ₹8,840
D. ₹9,000
View Answer
Amount = 8000 × (1.05)² = ₹8,820.
Q3. What is the compound interest on ₹10,000 at 10% per annum for 3 years?
A. ₹3,000
B. ₹3,100
C. ₹3,310
D. ₹3,500
View Answer
Amount = 10000 × (1.10)³ = ₹13,310.
CI = ₹13,310 − ₹10,000 = ₹3,310.
Q4. Find the compound interest on ₹4,000 at 5% per annum for 2 years.
A. ₹400
B. ₹410
C. ₹420
D. ₹440
View Answer
Amount = 4000 × (1.05)² = ₹4,410.
CI = ₹410.
Q5. A sum of ₹6,000 is invested at 10% compound interest for 2 years. Find the amount.
A. ₹7,200
B. ₹7,260
C. ₹7,320
D. ₹7,400
View Answer
Amount = 6000 × (1.10)² = ₹7,260.
Q6. What is the compound interest on ₹2,500 at 20% per annum for 2 years?
A. ₹1,000
B. ₹1,050
C. ₹1,100
D. ₹1,200
View Answer
Amount = 2500 × (1.20)² = ₹3,600.
CI = ₹3,600 − ₹2,500 = ₹1,100.
Q7. Find the amount on ₹12,000 at 5% compound interest for 2 years.
A. ₹13,200
B. ₹13,230
C. ₹13,260
D. ₹13,300
View Answer
Amount = 12000 × (1.05)² = ₹13,230.
Q8. A sum of ₹10,000 is invested at 8% compound interest for 2 years. Find the compound interest.
A. ₹1,600
B. ₹1,664
C. ₹1,680
D. ₹1,700
View Answer
Amount = 10000 × (1.08)² = ₹11,664.
CI = ₹1,664.
Q9. What is the amount on ₹20,000 at 10% compound interest for 2 years?
A. ₹24,000
B. ₹24,200
C. ₹24,400
D. ₹25,000
View Answer
Amount = 20000 × (1.10)² = ₹24,200.
Q10. What is the compound interest on ₹16,000 at 5% per annum for 3 years?
A. ₹2,400
B. ₹2,520
C. ₹2,523
D. ₹2,600
View Answer
Amount = 16000 × (1.05)³ = ₹18,523.
CI = ₹2,523.
Q11. Find the compound interest on ₹10,000 at 20% per annum for 2 years.
A. ₹4,000
B. ₹4,200
C. ₹4,400
D. ₹4,800
View Answer
Amount = 10000 × (1.20)² = ₹14,400.
CI = ₹4,400.
Q12. A sum of ₹5,000 becomes ₹6,050 in 2 years at compound interest. Find the annual rate.
A. 8%
B. 10%
C. 12%
D. 15%
View Answer
6050 / 5000 = 1.21 = (1.10)².
Therefore, rate = 10%.
Q13. A sum of ₹4,000 becomes ₹4,840 in 2 years at compound interest. Find the rate.
A. 8%
B. 9%
C. 10%
D. 12%
View Answer
4840 / 4000 = 1.21 = (1.10)².
Rate = 10%.
Q14. At 10% compound interest per annum, what will ₹10,000 become after 3 years?
A. ₹13,000
B. ₹13,100
C. ₹13,310
D. ₹13,500
View Answer
Amount = 10000 × (1.10)³ = ₹13,310.
Q15. Find the compound interest on ₹8,000 at 10% per annum for 3 years.
A. ₹2,400
B. ₹2,480
C. ₹2,648
D. ₹2,800
View Answer
Amount = 8000 × (1.10)³ = ₹10,648.
CI = ₹2,648.
Q16. Find the amount on ₹7,500 at 8% compound interest for 2 years.
A. ₹8,700
B. ₹8,748
C. ₹8,800
D. ₹8,900
View Answer
Amount = 7500 × (1.08)² = ₹8,748.
Q17. What is the compound interest on ₹25,000 at 4% per annum for 2 years?
A. ₹2,000
B. ₹2,040
C. ₹2,080
D. ₹2,100
View Answer
Amount = 25000 × (1.04)² = ₹27,040.
CI = ₹2,040.
Q18. A sum of ₹15,000 is invested at 6% compound interest for 2 years. Find the amount.
A. ₹16,800
B. ₹16,854
C. ₹16,900
D. ₹17,000
View Answer
Amount = 15000 × (1.06)² = ₹16,854.
Q19. What is the compound interest on ₹20,000 at 5% per annum for 3 years?
A. ₹3,000
B. ₹3,050
C. ₹3,152.50
D. ₹3,200
View Answer
Amount = 20000 × (1.05)³ = ₹23,152.50.
CI = ₹3,152.50.
Q20. Find the compound interest on ₹6,000 at 15% per annum for 2 years.
A. ₹1,800
B. ₹1,890
C. ₹1,950
D. ₹2,000
View Answer
Amount = 6000 × (1.15)² = ₹7,935.
CI = ₹1,935.
Q21. What is the compound interest on ₹4,000 at 10% per annum for 3 years?
A. ₹1,200
B. ₹1,240
C. ₹1,324
D. ₹1,400
View Answer
Amount = 4000 × (1.10)³ = ₹5,324.
CI = ₹1,324.
Q22. A sum of ₹10,000 is invested at 5% compound interest for 4 years. Find the amount.
A. ₹12,000
B. ₹12,155.06
C. ₹12,250
D. ₹12,500
View Answer
Amount = 10000 × (1.05)^4 = ₹12,155.06 approximately.
Q23. What is the compound interest on ₹10,000 at 5% per annum for 4 years?
A. ₹2,000
B. ₹2,050
C. ₹2,155.06
D. ₹2,250
View Answer
CI = ₹12,155.06 − ₹10,000 = ₹2,155.06.
Q24. What is the amount on ₹2,000 at 10% compound interest for 2 years?
A. ₹2,400
B. ₹2,420
C. ₹2,440
D. ₹2,500
View Answer
Amount = 2000 × (1.10)² = ₹2,420.
Q25. Find the compound interest on ₹2,000 at 10% per annum for 2 years.
A. ₹400
B. ₹420
C. ₹440
D. ₹460
View Answer
CI = ₹2,420 − ₹2,000 = ₹420.
Q26. A sum of ₹8,000 is compounded half-yearly at 10% per annum for 1 year. Find the amount.
A. ₹8,800
B. ₹8,810
C. ₹8,820
D. ₹8,840
View Answer
Half-yearly rate = 5%. Number of periods = 2.
Amount = 8000 × (1.05)² = ₹8,820.
Q27. Find the compound interest on ₹10,000 at 12% per annum compounded half-yearly for 1 year.
A. ₹1,200
B. ₹1,236
C. ₹1,240
D. ₹1,260
View Answer
Half-yearly rate = 6%.
Amount = 10000 × (1.06)² = ₹11,236.
CI = ₹1,236.
Q28. ₹20,000 is compounded half-yearly at 8% per annum for 1 year. Find the amount.
A. ₹21,600
B. ₹21,632
C. ₹21,680
D. ₹21,700
View Answer
Half-yearly rate = 4%.
Amount = 20000 × (1.04)² = ₹21,632.
Q29. Find the compound interest on ₹5,000 at 20% per annum compounded half-yearly for 1 year.
A. ₹1,000
B. ₹1,050
C. ₹1,100
D. ₹1,200
View Answer
Half-yearly rate = 10%.
Amount = 5000 × (1.10)² = ₹6,050.
CI = ₹1,050.
Q30. A sum of ₹10,000 is compounded quarterly at 8% per annum for 1 year. Find the amount.
A. ₹10,800
B. ₹10,824.32
C. ₹10,832
D. ₹10,864
View Answer
Quarterly rate = 2%. Number of periods = 4.
Amount = 10000 × (1.02)^4 = ₹10,824.32 approximately.
Q31. What is the compound interest on ₹10,000 at 8% per annum compounded quarterly for 1 year?
A. ₹800
B. ₹824.32
C. ₹840
D. ₹864
View Answer
Amount = ₹10,824.32.
CI = ₹824.32.
Q32. A sum of ₹16,000 is compounded half-yearly at 10% per annum for 2 years. Find the amount.
A. ₹19,360
B. ₹19,410.25
C. ₹19,520
D. ₹19,600
View Answer
Half-yearly rate = 5%. Number of periods = 4.
Amount = 16000 × (1.05)^4 = ₹19,410.25 approximately.
Q33. Find the compound interest on ₹16,000 at 10% per annum compounded half-yearly for 2 years.
A. ₹3,000
B. ₹3,200
C. ₹3,410.25
D. ₹3,500
View Answer
CI = ₹19,410.25 − ₹16,000 = ₹3,410.25.
Q34. At 12% per annum compounded half-yearly, what is the rate for each half-year?
A. 5%
B. 6%
C. 8%
D. 12%
View Answer
Half-yearly rate = 12% ÷ 2 = 6%.
Q35. At 8% per annum compounded quarterly, what is the rate for each quarter?
A. 1%
B. 2%
C. 4%
D. 8%
View Answer
Quarterly rate = 8% ÷ 4 = 2%.
Q36. ₹5,000 is invested at 10% compound interest for 2 years. What is the difference between compound interest and simple interest?
A. ₹40
B. ₹50
C. ₹60
D. ₹100
View Answer
For 2 years, difference = P × (R/100)².
= 5000 × (10/100)² = ₹50.
Q37. Find the difference between CI and SI on ₹10,000 at 10% per annum for 2 years.
A. ₹100
B. ₹110
C. ₹120
D. ₹150
View Answer
Difference = 10000 × (10/100)² = ₹100.
Q38. Find the difference between compound interest and simple interest on ₹8,000 at 5% per annum for 2 years.
A. ₹10
B. ₹20
C. ₹25
D. ₹40
View Answer
Difference = 8000 × (5/100)² = ₹20.
Q39. The difference between CI and SI on a sum at 10% per annum for 2 years is ₹80. Find the principal.
A. ₹6,000
B. ₹7,000
C. ₹8,000
D. ₹9,000
View Answer
80 = P × (10/100)².
P = ₹8,000.
Q40. The difference between CI and SI on ₹5,000 at 10% for 2 years is:
A. ₹25
B. ₹40
C. ₹50
D. ₹100
View Answer
Difference = 5000 × 10² / 100² = ₹50.
Q41. A sum of ₹10,000 is invested at 10% compound interest. What is the interest earned in the first year?
A. ₹900
B. ₹1,000
C. ₹1,100
D. ₹1,200
View Answer
First-year interest = 10% of ₹10,000 = ₹1,000.
Q42. On ₹10,000 at 10% compound interest, what is the interest earned in the second year?
A. ₹1,000
B. ₹1,050
C. ₹1,100
D. ₹1,200
View Answer
Amount after first year = ₹11,000.
Second-year interest = 10% of ₹11,000 = ₹1,100.
Q43. On ₹8,000 at 5% compound interest, what is the interest earned in the second year?
A. ₹400
B. ₹410
C. ₹420
D. ₹440
View Answer
Amount after first year = ₹8,400.
Second-year interest = 5% of ₹8,400 = ₹420.
Q44. A sum of ₹20,000 is invested at 10% compound interest. What is the interest earned during the third year?
A. ₹2,200
B. ₹2,420
C. ₹2,500
D. ₹2,600
View Answer
Amount after 2 years = ₹24,200.
Third-year interest = 10% of ₹24,200 = ₹2,420.
Q45. If the principal is doubled while the rate and time remain unchanged, the compound interest will:
A. Remain unchanged
B. Become half
C. Become double
D. Become four times
View Answer
Compound interest is directly proportional to the principal when rate and time are fixed.
Q46. If the annual rate is increased from 5% to 10%, while principal and time remain unchanged, the compound interest will:
A. Always become exactly double
B. Remain the same
C. Increase, but not necessarily become exactly double
D. Become half
View Answer
Compound interest depends on the power of the growth factor, so doubling the rate does not generally make the final compound interest exactly double.
Q47. If the time period is doubled, with principal and rate unchanged, compound interest will:
A. Always become exactly double
B. Depend on the rate and original time
C. Become half
D. Become zero
View Answer
Unlike simple interest, compound interest does not increase linearly with time.
Q48. A sum of ₹4,000 is invested at 10% compound interest for 2 years. What is the total amount?
A. ₹4,800
B. ₹4,840
C. ₹4,880
D. ₹5,000
View Answer
Amount = 4000 × (1.10)² = ₹4,840.
Q49. A sum of ₹3,000 is invested at 20% compound interest for 2 years. Find the amount.
A. ₹4,200
B. ₹4,280
C. ₹4,320
D. ₹4,400
View Answer
Amount = 3000 × (1.20)² = ₹4,320.
Q50. Find the compound interest on ₹3,000 at 20% per annum for 2 years.
A. ₹1,200
B. ₹1,260
C. ₹1,320
D. ₹1,400
View Answer
CI = ₹4,320 − ₹3,000 = ₹1,320.
Q51. A sum becomes ₹7,260 in 2 years at 10% compound interest. Find the principal.
A. ₹5,500
B. ₹6,000
C. ₹6,500
D. ₹7,000
View Answer
P = 7260 / (1.10)² = ₹6,000.
Q52. A sum becomes ₹8,820 in 2 years at 5% compound interest. Find the principal.
A. ₹7,500
B. ₹8,000
C. ₹8,500
D. ₹9,000
View Answer
P = 8820 / (1.05)² = ₹8,000.
Q53. A sum becomes ₹11,664 in 2 years at 8% compound interest. Find the principal.
A. ₹9,500
B. ₹10,000
C. ₹10,500
D. ₹11,000
View Answer
P = 11664 / (1.08)² = ₹10,000.
Q54. A sum becomes ₹14,400 in 2 years at 20% compound interest. Find the principal.
A. ₹10,000
B. ₹11,000
C. ₹12,000
D. ₹13,000
View Answer
P = 14400 / (1.20)² = ₹10,000.
Q55. A sum of ₹5,000 becomes ₹6,655 after 3 years at compound interest. Find the annual rate.
A. 8%
B. 10%
C. 12%
D. 15%
View Answer
6655 / 5000 = 1.331 = (1.10)³.
Rate = 10%.
Q56. A sum of ₹8,000 becomes ₹10,648 in 3 years at compound interest. Find the rate.
A. 8%
B. 10%
C. 12%
D. 15%
View Answer
10648 / 8000 = 1.331 = (1.10)³.
Rate = 10%.
Q57. A sum of ₹4,000 becomes ₹5,324 in 3 years at compound interest. Find the rate.
A. 8%
B. 10%
C. 12%
D. 15%
View Answer
5324 / 4000 = 1.331 = (1.10)³.
Rate = 10%.
Q58. A sum of ₹2,000 becomes ₹2,420 in 2 years at compound interest. Find the rate.
A. 5%
B. 8%
C. 10%
D. 12%
View Answer
2420 / 2000 = 1.21 = (1.10)².
Rate = 10%.
Q59. At 10% compound interest per annum, a sum becomes ₹12,100 in 2 years. Find the principal.
A. ₹9,000
B. ₹10,000
C. ₹11,000
D. ₹12,000
View Answer
P = 12100 / 1.21 = ₹10,000.
Q60. A sum becomes ₹9,680 in 2 years at 10% compound interest. Find the principal.
A. ₹7,500
B. ₹8,000
C. ₹8,500
D. ₹9,000
View Answer
P = 9680 / 1.21 = ₹8,000.
Q61. Find the compound interest on ₹10,000 at 10% per annum for 2 years when interest is compounded annually.
A. ₹2,000
B. ₹2,050
C. ₹2,100
D. ₹2,200
View Answer
Amount = ₹12,100.
CI = ₹2,100.
Q62. What is the amount on ₹25,000 at 4% compound interest for 2 years?
A. ₹27,000
B. ₹27,040
C. ₹27,080
D. ₹27,100
View Answer
Amount = 25000 × (1.04)² = ₹27,040.
Q63. What is the compound interest on ₹25,000 at 4% for 2 years?
A. ₹1,900
B. ₹2,000
C. ₹2,040
D. ₹2,080
View Answer
CI = ₹27,040 − ₹25,000 = ₹2,040.
Q64. Find the amount on ₹12,500 at 8% compound interest for 2 years.
A. ₹14,400
B. ₹14,500
C. ₹14,580
D. ₹14,600
View Answer
Amount = 12500 × (1.08)² = ₹14,580.
Q65. Find the compound interest on ₹12,500 at 8% for 2 years.
A. ₹1,900
B. ₹2,000
C. ₹2,080
D. ₹2,200
View Answer
CI = ₹14,580 − ₹12,500 = ₹2,080.
Q66. What is the amount on ₹20,000 at 6% compound interest for 2 years?
A. ₹22,400
B. ₹22,472
C. ₹22,500
D. ₹22,600
View Answer
Amount = 20000 × (1.06)² = ₹22,472.
Q67. Find the compound interest on ₹20,000 at 6% for 2 years.
A. ₹2,400
B. ₹2,472
C. ₹2,500
D. ₹2,600
View Answer
CI = ₹22,472 − ₹20,000 = ₹2,472.
Q68. A sum of ₹6,400 is invested at 12.5% compound interest for 2 years. Find the amount.
A. ₹8,000
B. ₹8,100
C. ₹8,100 approximately
D. ₹8,200
View Answer
Amount = 6400 × (1.125)² = ₹8,100.
Q69. Find the compound interest on ₹6,400 at 12.5% per annum for 2 years.
A. ₹1,600
B. ₹1,700
C. ₹1,800
D. ₹2,000
View Answer
Amount = ₹8,100.
CI = ₹8,100 − ₹6,400 = ₹1,700.
Q70. A sum of ₹2,500 is invested at 8% compound interest for 2 years. Find the amount.
A. ₹2,900
B. ₹2,916
C. ₹2,920
D. ₹3,000
View Answer
Amount = 2500 × (1.08)² = ₹2,916.
Q71. Find the compound interest on ₹2,500 at 8% per annum for 2 years.
A. ₹400
B. ₹416
C. ₹420
D. ₹440
View Answer
CI = ₹2,916 − ₹2,500 = ₹416.
Q72. A sum of ₹10,000 is compounded half-yearly at 10% per annum for 2 years. Find the amount.
A. ₹12,000
B. ₹12,155.06
C. ₹12,185.06
D. ₹12,200
View Answer
Half-yearly rate = 5%. Number of periods = 4.
Amount = 10000 × (1.05)^4 = ₹12,155.06 approximately.
Q73. A sum of ₹4,000 is compounded half-yearly at 8% per annum for 1 year. Find the amount.
A. ₹4,320
B. ₹4,323.84
C. ₹4,340
D. ₹4,360
View Answer
Half-yearly rate = 4%.
Amount = 4000 × (1.04)² = ₹4,323.84.
Q74. Find the compound interest on ₹4,000 at 8% per annum compounded half-yearly for 1 year.
A. ₹300
B. ₹323.84
C. ₹340
D. ₹360
View Answer
CI = ₹4,323.84 − ₹4,000 = ₹323.84.
Q75. ₹10,000 is compounded quarterly at 12% per annum for 1 year. Find the amount.
A. ₹11,200
B. ₹11,255.09
C. ₹11,300
D. ₹11,400
View Answer
Quarterly rate = 3%.
Amount = 10000 × (1.03)^4 = ₹11,255.09 approximately.
Q76. Find the compound interest on ₹10,000 at 12% per annum compounded quarterly for 1 year.
A. ₹1,200
B. ₹1,240
C. ₹1,255.09
D. ₹1,300
View Answer
CI = ₹11,255.09 − ₹10,000 = ₹1,255.09.
Q77. Which is greater for the same principal, rate and time greater than one year?
A. Simple Interest
B. Compound Interest
C. Both are always equal
D. Neither
View Answer
For a positive rate and a period of more than one compounding period, compound interest is generally greater than simple interest.
Q78. If interest is compounded annually, the interest earned in each successive year is generally:
A. Decreasing
B. Equal
C. Increasing
D. Zero
View Answer
Each year’s interest is calculated on an increasingly larger amount.
Q79. What is the compound interest on ₹10,000 at 10% per annum for 2 years if interest is compounded annually?
A. ₹1,900
B. ₹2,000
C. ₹2,100
D. ₹2,200
View Answer
Amount = ₹12,100.
CI = ₹2,100.
Q80. What is the difference between CI and SI on ₹10,000 at 10% for 2 years?
A. ₹50
B. ₹100
C. ₹150
D. ₹200
View Answer
CI = ₹2,100 and SI = ₹2,000.
Difference = ₹100.
Q81. The difference between compound interest and simple interest on ₹20,000 at 5% per annum for 2 years is:
A. ₹40
B. ₹50
C. ₹60
D. ₹100
View Answer
Difference = 20000 × (5/100)² = ₹50.
Q82. The difference between CI and SI on a sum at 8% per annum for 2 years is ₹128. Find the principal.
A. ₹16,000
B. ₹18,000
C. ₹20,000
D. ₹22,000
View Answer
128 = P × (8/100)².
P = ₹20,000.
Q83. The difference between CI and SI on a sum at 10% for 2 years is ₹150. Find the principal.
A. ₹10,000
B. ₹12,000
C. ₹15,000
D. ₹18,000
View Answer
150 = P × (10/100)².
P = ₹15,000.
Q84. A sum of ₹5,000 earns compound interest at 10% per annum. Find the total interest after 2 years.
A. ₹1,000
B. ₹1,050
C. ₹1,100
D. ₹1,150
View Answer
Amount = ₹6,050.
CI = ₹1,050.
Q85. A sum of ₹7,000 earns compound interest at 5% per annum for 2 years. Find the compound interest.
A. ₹700
B. ₹717.50
C. ₹735
D. ₹750
View Answer
Amount = 7000 × (1.05)² = ₹7,717.50.
CI = ₹717.50.
Q86. A sum of ₹9,000 earns compound interest at 10% per annum for 2 years. Find the amount.
A. ₹10,800
B. ₹10,890
C. ₹11,000
D. ₹11,100
View Answer
Amount = 9000 × (1.10)² = ₹10,890.
Q87. A sum of ₹9,000 earns compound interest at 10% per annum for 2 years. Find the compound interest.
A. ₹1,800
B. ₹1,890
C. ₹1,980
D. ₹2,000
View Answer
CI = ₹10,890 − ₹9,000 = ₹1,890.
Q88. A sum of ₹6,000 is invested at 5% compound interest for 3 years. Find the amount.
A. ₹6,900
B. ₹6,945.75
C. ₹7,000
D. ₹7,050
View Answer
Amount = 6000 × (1.05)³ = ₹6,945.75.
Q89. Find the compound interest on ₹6,000 at 5% per annum for 3 years.
A. ₹900
B. ₹945.75
C. ₹950
D. ₹1,000
View Answer
CI = ₹6,945.75 − ₹6,000 = ₹945.75.
Q90. A sum of ₹15,000 is invested at 4% compound interest for 3 years. Find the amount.
A. ₹16,800
B. ₹16,872.96
C. ₹17,000
D. ₹17,200
View Answer
Amount = 15000 × (1.04)³ = ₹16,872.96.
Q91. Find the compound interest on ₹15,000 at 4% per annum for 3 years.
A. ₹1,800
B. ₹1,872.96
C. ₹1,900
D. ₹2,000
View Answer
CI = ₹16,872.96 − ₹15,000 = ₹1,872.96.
Q92. If a sum doubles in 10 years at compound interest, the annual rate is approximately:
A. 6%
B. 7.18%
C. 8%
D. 10%
View Answer
For doubling, (1 + R/100)^10 = 2.
Therefore, R is approximately 7.18% per annum.
Q93. If a sum doubles in 5 years at compound interest, what will be the amount after 10 years?
A. 2 times the principal
B. 3 times the principal
C. 4 times the principal
D. 5 times the principal
View Answer
If the amount doubles every 5 years, it becomes four times the principal after 10 years.
Q94. If a sum becomes three times in 10 years at compound interest, what will it become in 20 years at the same rate?
A. 6 times
B. 8 times
C. 9 times
D. 12 times
View Answer
The growth factor over 10 years is 3. Over another 10 years it is multiplied by 3 again.
Therefore, amount = 3 × 3 = 9 times the principal.
Q95. A sum of ₹10,000 is invested at 10% compound interest. What will be the amount after 1 year?
A. ₹10,500
B. ₹11,000
C. ₹11,100
D. ₹12,000
View Answer
Amount = ₹10,000 + 10% of ₹10,000 = ₹11,000.
Q96. A sum of ₹12,000 is invested at 5% compound interest for 2 years. Find the compound interest.
A. ₹1,200
B. ₹1,215
C. ₹1,230
D. ₹1,250
View Answer
Amount = 12000 × (1.05)² = ₹13,230.
CI = ₹1,230.
Q97. A sum of ₹7,500 is invested at 10% compound interest for 3 years. Find the amount.
A. ₹9,900
B. ₹9,982.50
C. ₹10,000
D. ₹10,125
View Answer
Amount = 7500 × (1.10)³ = ₹9,982.50.
Q98. Find the compound interest on ₹7,500 at 10% per annum for 3 years.
A. ₹2,250
B. ₹2,400
C. ₹2,482.50
D. ₹2,500
View Answer
CI = ₹9,982.50 − ₹7,500 = ₹2,482.50.
Q99. A sum of ₹20,000 is invested at 5% compound interest for 2 years. Find the amount.
A. ₹21,800
B. ₹22,000
C. ₹22,050
D. ₹22,100
View Answer
Amount = 20000 × (1.05)² = ₹22,050.
Q100. Find the compound interest on ₹20,000 at 5% per annum for 2 years.
A. ₹2,000
B. ₹2,050
C. ₹2,100
D. ₹2,150
View Answer
Amount = ₹22,050.
CI = ₹22,050 − ₹20,000 = ₹2,050.
These 100 Compound Interest Questions with Answers provide useful practice for students preparing for SSC, Railway, Banking, Defence, Police and other competitive examinations. The questions cover important concepts such as compound interest, amount, principal, rate, time, annual compounding, half-yearly compounding, quarterly compounding and the difference between Simple Interest and Compound Interest.
Before checking the answer, try to solve each question yourself using the appropriate Compound Interest formula. Pay particular attention to the compounding period because the rate and number of periods change when interest is compounded half-yearly or quarterly.
Regular practice of Compound Interest questions can improve calculation speed, accuracy and confidence in quantitative aptitude. After completing this set, you can practice related topics such as Simple Interest, Percentage, Profit and Loss, Ratio and Proportion, Average, Time and Work, and Time, Speed and Distance.
Maths(Quantitative Aptitude) MCQs
Practice important Topic wise Maths/Quantitative Aptitude Questions with Solutions for competitive exams.