Compound Interest 1/3

13. If Compound Interest on a certain sum for 2 years at 5% p.a. is Rs.328, the Simple interest will be ?
a. Rs.320
b. Rs.340
c. Rs.360
d. Rs.380

14. A sum of money becomes Rs.6690 after three years and Rs.10,035 after 6 years on compound interest. The sum is :
a. Rs.4400
b. Rs.4445
c. Rs.4460
d. Rs.4520

15. Rs.1600 at 10% per annum compound interest compound half-yearly amount to Rs.1944.81 in
a. 2 years
b. 3 years
c. $1\displaystyle\frac{1}{2}$ years
d. $2\displaystyle\frac{1}{2}$ years

16. The difference between simple interest and compound interest on a sum for 2 years at 8%, when the interest is compounded annually Rs.16. If the interest was compounded half-yearly, the difference in two interests would be nearly :
a. Rs.16
b. Rs.16.80
c. Rs.21.85
d. Rs.24.64

17. The difference in C.I and S.I for 2 years on a sum of money is Rs.160. If the S.I for 2 years be Rs.2880, the rate percent is :
a. $5\displaystyle\frac{5}{9}$%
b. $12\displaystyle\frac{1}{2}$%
c. $11\displaystyle\frac{1}{9}$%
d. 9%
d. Data inadequate

18. The value of a machine depreciates every year at the rate of 10% on its value at the beginning of that year. If the present value of the machine is Rs.729, its worth 3 years ago was :
a. Rs.947.10
b. Rs.800
c. Rs.1000
d. Rs.750.87

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