A borrowed Rs. 2500 from B at 12 % per annum compound interest. After 2 years, A gave Rs. 2936 and a watch to B to clear the account. Find the cost of the watch.

Meenal lends Rs. 75000 at C.I. for 3 years. If the rate of interest for the first two years is 15% per year and for the third year it is 16%. Calculate the sum Meenal will get at the end of the third year.

Calculate the difference between simple interest and the compound interest on Rs. 4000 in two years at 8% per annum compounded yearly.

What sum will amount to Rs.6593.40 in 2 years at C.I., if the rates are 10 % for the two successive years.

Calculate the compound interest for the second year on Rs. 8000/- invested for 3 years at 10% per annum.

A sum is invested at compound interest compounded yearly. If the interest for two successive years be Rs. 5700 and Rs. 7410, calculate the rate of interest.