A man purchased a cow for Rs 3000 and sold it the same day for Rs 3600, allowing the buyer a credit of 2 years. If the rate of interest be 10% per annum, then the man has a gain of (a) 0%       (b) 5%     (c) 7.5%    (d) 10%

A man buys a watch for Rs 1950 in cash and sells it for Rs 2200 at a credit of 1 year. If the rate of interest is 10% per annum, the man (a) gains Rs 55 (b) gains Rs 50 (c) loses Rs 30 (d) gains Rs 30

1.080 invested for 3 months gave an interest of 0.027. The simple rate of interest per annum was : (a) 2.5 % (b) 5% (c) 7.5% (d) 10%

RS 4000for 1(1)/(2) years at 10% per years at 10% per annum

The compound interest on Rs 5000 at 10% per annum for 2 years is

Find the compound interest of Rs. 12000 in 3 years at the rate of 10% compound interest per annum.

A lent Rs 5000 to B for 2 years and Rs 3000 to C for 4 years on simple interest at the same rate of interest and received Rs 2200 in all from both of them as interest. The rate of interest per annum is (a) 5% (b) 7% (c) 7 1/8% (d) 10%

Find the difference betweeen compound interest and simple interest of Rs 10,000 for 2 years at the rate of interest 10% per annum.