1. A sum of money amounts to Rs. 9680 in 2 yr and Rs. 10648 in 3 years at compound interest. The sum is
(a) Rs.8000
(b) Rs.8400
(c) Rs.9000
(d) Rs.9600

2. A sum of money placed at compound interest doubles itself in 6 yr. In how many year it would amount to 4 times of itself at the same rate of interest?
(a) 12 yr
(b) 24 yr
(c) 18 yr
(d) 15 yr

3. If the rate of interest be 5% per annum for first year, 8% per annum for second year and 12% per annum for third year, then the compound interest of Rs. 8000 for 3 yr will be
(a) Rs.10550.16
(b) Rs. 10480.24
(c) Rs. 10160.64

(d) Rs. 10350.36

4. A money-lender borrows money at 5% per annum and pays interest at the end of the year. He lends it at 8% per annum compound interest compounded half-yearly and receives the interest at the end of the year. Thus, he gains Rs. 118.50 in a year. The amount of money he borrows is
(a) Rs. 3450
(b) Rs. 3600
(c) Rs. 3750
(d) Rs. 3900

5. Effective annual rate of interest, corresponding to a nominal rate of 4% per annum payable half-yearly is
(a) 4.04% per annum
(b) 4.15% per annum
(c) 4.18% per annum
(d) 4.10% per annum

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