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

How much will ₹ 50000 amount to in 3 years compounded yearly, if the rates for the successive years are 6%, 8% and 10% respectively.

Find the compound interest on ₹ 4000 accrued in three years, when the rate of interest is 8% for the first year and 10% per year for the second and the third years.

The difference between C.I. and S.I. in one year on ₹ 5000 at the rate of 10% per annum is :

1. ₹ 00

2. ₹ 500

3. ₹ 5500

4. ₹ 5250