1. At what rate of interest per annum at simple interest will an amount get doubled in 10 years?

(a) 8%

(b) 10%

(c) 12%

(d) Cannot be determined

**3.**Ram claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 20%, the effective rate of interest becomes

(a) 21.5%

(b) 21%

(c) 20%

(d) Cannot be determined

**4.**An amount of Rs 1,00,000 is invested in two types of shares. The first yields an interest of 9% p.a. and the second, 13% p.a. If the total interest at the end of one year is 10%, then the amount invested in each share was:

(a) Rs 52,500, Rs 47,500

(b) Rs 75,000, Rs 25,000

(c) Rs 72,500, Rs 27,500

(d) Rs 82,500, Rs 17,500

5.A certain sum amounts to Rs. 1,452 in two years and to Rs. 1,597.20 in three years at compound interest, then rate per cent is:

(a)10

(b)11

(c)13

(d)9

6.If the compound interest on a certain sum for two years at 10% p.a. is Rs. 2,100 the simple interest on it at the same rate for two years will be

(a)Rs. 1,980

(b)Rs. 1,760

(c)Rs. 2,000

(d)Rs. 1,800

7.The difference between simple interest and compound interest on a certain sum of money for three years at 10% per annum is Rs. 15 and paise 50. The sum is:

(a)Rs. 5,000

(b)Rs. 550

(c)Rs. 5,500

(d)Rs. 500

**8.**A man saves Rs. 200 at the end of each year and lends the money at 5% compound interest. How much will it become at the end of 3 years?

(a) Rs. 565.25

(b) Rs. 635

(c) Rs. 662.02

(d) Rs. 666.50

**9.**A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits Rs. 1600 each on 1

^{st}January and 1

^{st}July of a year. At the end of the year, the amount he would have gained by way of interest is

(a) Rs. 120

(b) Rs. 121

(c) Rs. 122

(d) Rs. 123

**10.**The difference between simple interest and compound interest on Rs. 1200 for one year at 10% per annum reckoned half-yearly is:

(a) Rs. 2.50

(b) Rs. 3

(c) Rs. 3.75

(d) Rs. 4