A sum of Rs. 2000 amounts to Rs. 4000 in two years at compound interest. In how many years does the same amount becomes Rs. 8000. 

Vijay lent Rs.5000. At what rate percent per annum he lent the money?
Statement I: The difference between the simple interest and compound interest on same money is Rs.60.
Statement II: The simple interest obtained after 4 years is Rs.300.
Statement III: The difference between compound interest and simple interest on Rs.60,000 in 2 years is Rs.1350.

What would be the compound interest accrued on an amount of Rs.7850 at the rate of 14% per annum in two years?

If the compound interest on a certain sum for two consecutive years is Rs.220 and Rs.242, then the rate of interest per annum is 

On what sum does the difference between the compound interest and the simple interest for 3 years at 10 % is Rs 31?

In 3 years ₹ 3000 amounts to ₹ 3993 at x % compound interest, compounded annually. The value of x is 

A certain amount of money earns ₹ 540 as simple interest in 3 years. If it earns compound interest of ₹ 376.20 at the same rate of interest in 2 years, find the principal (in Rupees).