Simple and compound interest Questions and answers

  1. Aptitude
    1. Compound interest
    2. Boat and Stream
    3. Trains
    4. Percentage
    5. Discount
    6. Mixture and Allegation
    7. Unitary Method
    8. Work and Wages
    9. Pipes and Cisterns
    10. Linear Equations
    11. Approximation
    12. Word problems
    13. Number System
    14. Time and Distance
    15. Average
    16. Ratio and Proportions
    17. Profit and Loss
    18. Partnership
    19. Permutation and combination
    20. Probability
    21. Problem on ages
    22. Time and work
    23. Simple and compound interest
    24. Mensuration
    25. Number series
31). A principal amounts to RS. 944 in 3 yr and to RS. 1040 in 5 yr, each sum being invested at the same simple interest. The principal was
A). RS.800
B). RS.991
C). RS.750
D). RS.900
32). A sum of RS. 1550 was lent partly at 5% and partly at 8% per annum simple interest. The total interest received after 4 yr was RS. 400. The ratio of the money lent at 5% to that lent at 8% is
A). 16:15
B). 17:15
C). 16:13
D). 16:19
33). Neeta borrowed some money at the rate of 6% per annum for the first 3 yr, at the rate of 9% per annum for the next 5 yr and at the rate of 13% per annum for the period beyond 8 yr. If she pays a total interest of RS. 8160 at the end of 11 yr, how much money did she borrow?
A). RS.12000
B). RS.10000
C). RS.8000
D). Data is inadequate
34). Mr. Pawan invests an amount of RS. 24200 at the rate of 4% per annum for 6 yr to obtain a simple interest, later he invests the principal amount as well as the amount obtained as simple interest for another 4 yr at the same rate of interest. What amount of simple interest will be obtained at the end of the last 4 yr?
A). RS.4800
B). RS.4850.32
C). RS.4801.28
D). RS.4700
35). A person invests RS. 12000 as fixed deposit at a bank at the rate of 10% per annum simple interest.But due to some pressing needs, he has to withdraw the entire money after 3yr, for which the bank allowed him a lower rate of interest. If he gets RS.3320 less than, what he would have got at the end of 5yr, the rate of interest allowed by bank is
A). \( \Large 7\frac{8}{9}\% \)
B). \( \Large 8\frac{7}{9}\% \)
C). \( \Large 7\frac{8}{9}\% \)
D). \( \Large 7\frac{4}{9}\% \)


36). Ramu wanted to borrow Rs.1000 from a moneylender for a period of one year. However, the moneylender deducted Rs.200 as interest charges and gave Rs.800 to Ramu. Ramu returned Rs.1000 at the end of the year. The rate of interest charged by the moneylender is
A). 20%
B). 22.50%
C). 25%
D). 27.50%
37). Rajan borrowed Rs.50000 from Rakesh at simple interest. After 3 years, Rakesh got Rs.3000 more than what he had given to Rajan. What was the rate of interest per annum?
A). 2%
B). 5%
C). 8%
D). 10%
38). Rakesh took a loan for 7 years at the rate of 6 % p.a. S.I. If total interest paid was Rs.2100, then principal was
A). Rs.4400
B). Rs.4800
C). Rs.5000
D). Rs.5200
39). How much should money lender lend at simple rate of interest of 15% in order to have Rs.3234 at the end of \( \Large 1\frac{1}{2} \) years?
A). Rs.1640
B). Rs.2620
C). Rs.2610
D). Rs.2640
40). If an amount Rs.8000 becomes to Rs.9200 in 3 years at simple interest. If rate of interest is increased by 3%, it would amount to
A). Rs.9920
B). Rs.10560
C). Rs.11120
D). Rs.11820
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