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Compound Interest 1/4

19. The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is :
a. 3
b. 4
c. 5
d. 6


20. The compound interest on Rs.2800 for $1\displaystyle\frac{1}{2}$years at 10% per annum is :
a. Rs.441.35
b. Rs.436.75
c. Rs.434
d. Rs.420


21. If Rs.7500 are borrowed at C.I at the rate of 4% per annum, then after 2 years the amount to be paid is :
a. Rs.8082
b. Rs.7800
c. Rs.8100
d. Rs.8112


22. A sum amounts to Rs.2916 in 2 years and to Rs.3149.28 in 3 years at compound interest. The sum is :
a. Rs.1500
b. Rs.2000
c. Rs.2500
d. Rs.3000


23. A sum of money amounts to Rs.10648 in 3 years and Rs.9680 in 2 years. The rate of interest is :
a. 5%
b. 10%
c. 15%
d. 20%


24. The difference between simple interest and compound interest at the same rate for Rs.5000 for 2 years is Rs.72. The rate of interest is :
a. 10%
b. 12%
c. 6%
d. 8%

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