Compound Interest

1.		A money lender borrows money at 5% per annum and pays the interest at the end of the year. He lends it at 8% per annum compounded half yearly and receives the interest at the end of the year. In this way , he gains Rs 632 a year. The amount of money he borrows is:

20000

21000

22500

15000

2.		Simple interest on a certain sum of money at a certain rate of interest is Rs 100 in 2.5 years. But the compound interest on the same sum of money at the same rate of interest compounded annually in 2 years is Rs 85. Find the sum?

300

310

320

640

3.		Certain sum becomes 3 times it self at compound interest in 10 years. In how many years it becomes 9 times?

25 years

27 years

30 years

20 years

4.		In what time will Rs. 1000 become Rs. 1331 at 10% per annum compounded annually?

1 year

4 years

3 years

6 years

5.		The Simple interest on a certain sum for 2 years at 10% per annum is Rs. 90. The corresponding compound interest is:

Rs. 99

Rs. 94.50

Rs. 95.60

Rs. 108

6.		If a sum on compound interest becomes three times in 4 years, then with the same interest rate, the sum will become 81 times in:

18 years

12 years

16 years

14 years

7.		A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to eight times itself?

16

8

12

20

8.		The least number of complete years in which a sum of money put at 20% compound interest will be more than doubled is:

3

2

5

4

9.		Find out the C.I. on Rs. 5000 at 4% p.a. compounded half-yearly for 1 1/2 years.

Rs. 420.20

Rs. 319.06

Rs. 306.04

Rs. 294.75

10.		The difference between compound Interest and simple interest on an amount of Rs. 30,000 for 2 years is Rs. 192. What is the rate of interest per annum?

8%

11%

12%

12.5%