1. If Rs. 64 accounts to Rs. 83.20 in 2 years, what will  Rs. 86 amount to in 4 years at the same rate per cent pr annum?
(a) Rs. 115.80
(b) Rs. 127.70
(c) Rs. 127.40
(d) Rs. 51.60

2. The simple interest on a certain sum of money at the rate of 5% p.a. for 8 years is Rs. 840. At what rate of interest the same amount of interest can be received on the same sum after 5 years?
(a) 10%
(b) 8%
(c) 9%
(d) 12%

3. The interest on a certain deposit at 4.5% p.a. is Rs. 202.50 in one year. How much will the additional interest in one year be on the same deposit at 5% p.a.?
(a) Rs. 30.25
(b) Rs. 22.50
(c) Rs. 25
(d) Rs. 52.75 

4. A sum invested at 5% simple interest per annum grows to Rs. 504 in 4 years. The same amount at 10% simple interest per annum in 2½ years will grow to:
(a) Rs. 530
(b) Rs. 555
(c) Rs. 525
(d) Rs. 650

5. What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?
(a) 5 : 3
(b) 4 : 7
(c) 2 : 3
(d) data inadequate

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