Aptitude Questions on Compound Interest

  1. The principle that amounts to Rs. 4913 in 3 years at 6 1/4 % per annum C.I. compounded annually, is?
    A. Rs. 3096
    B. Rs. 4076
    C. Rs. 4085
    D. Rs. 4096
  2. D. Rs. 4096
    According to the formula,
    Principle = [4913 / (1 + 25/ (4 * 100))3]
    => 4913 * 16/17 * 16/17 * 16/17 = Rs. 4096
  3. Find the Compound Interest on Rs.8000 at 5% per annum for 3 years when C.I is reckoned yearly?
    A. Rs. 1,185
    B. Rs. 1,261
    C. Rs. 1,346
    D. Rs. 1,440
  4. B. Rs. 1,261
    A = 8000(21/20)^3 = 9261
    Now, 9261 - 8000 = Rs. 1,261
  5. The difference between simple interest and C.I. at the same rate for Rs.5000 for 2 years in Rs.72. The rate of interest is?
    A. 6%
    B. 8%
    C. 10%
    D. 12%
  6. D. 12%
    5000 = 72(100/R)^2
    5 R^2 = 720 => R = 12
  7. The difference between compound and simple interest on a certain sum of money for 3 years at 6 2/3% p.a is Rs.184. Find the sum?
    A. Rs.12,000
    B. Rs.13,500
    C. Rs.14,200
    D. Rs.17,400
  8. B. Rs.13,500
    P = (184*10^6) / [6 2/3 * 6 2/3 *(300*6 2/3)]
    P = 13500
  9. A sum of money is put out at compound interest for 2 years at 20%. It would fetch Rs.482 more if the interest were payable half-yearly, then it were pay able yearly. Find the sum.
    A. Rs.1,000
    B. Rs.1,250
    C. Rs.2,000
    D. Rs.4,000
  10. C. Rs.2,000
    P(11/10)^4 - P(6/5)^2 = 482
    P = 2000
  11. The difference between the compound interest compounded annually and simple interest for 2 years at 20% per annum is Rs.144. Find the principal?
    A. Rs.3,000
    B. Rs.3,300
    C. Rs.3,600
    D. Rs.3,900
  12. C. Rs.3,600
    P = 144(100/5)^2 => P = 3600
  13. Find the amount on Rs.8000 in 9 months at 20% per annum, if the interest being compounded quarterly?
    A. Rs.9,021
    B. Rs.9,162
    C. Rs.9,261
    D. Rs.9,621
  14. C. Rs.9,261
    A = 8000(21/20)^3 = 9261
  15. Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.64000?
    A. Rs.61,000
    B. Rs.65,000
    C. Rs.71,000
    D. Rs.81,000
  16. D. Rs.81,000
    64000* 9/8 * 9/8 = 81000
  17. Indu gave Bindu Rs.1250 on compound interest for 2 years at 4% per annum. How much loss would Indu has suffered had she given it to Bindu for 2 years at 4% per annum simple interest?
    A. Rs.10
    B. Rs.5
    C. Rs.3
    D. Rs.2
  18. D. Rs.2
    1250 = D(100/4)^2
    D = 2
  19. How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
    A. Rs.424
    B. Rs.482
    C. Rs.512
    D. Rs.842
  20. B. Rs.482
    20000(11/10)^4 - 20000(6/5)^2 = 482