The difference between the compound and the simple interest on a sum for 2 years at 10 % per annum , when the interest is compounded annually, is Rs.28. If the yearly interest were compounded half yearly, the difference in the two interests will be 

If the difference between 2 years compound interest and simple interest at the rate of 5 percent of an amount is Rs. 25, then that amount will be?

If the compound interest rate is 20%  per year, compounded half-yearly, then what will be the interest of two years on the principal of 1,00,000?

The difference between the compound interest and simple interest on a certain sum at the rate of 5% p.a in 3 years is Rs. 15.25. The sum is:

What will be the compound interest (compounded annually) of 3 years at the rate of 12.5 percent on an amount of Rs. 5120?

A sum of money doubles itself at compound interest in 15 years. In how many years it  will become eight times?

A man invested a certain sum in scheme A at 15% p.a. for 2 years and earned Rs 1950 as simple interest. He increased his sum by Rs. ‘x’ and invested in another scheme B at 10% p.a. C.I. for 2 years and received Rs. 1680 as compound interest. Find the value of ‘x’. 

A sum of Rs. 8000 will amount to Rs. 8820 in 2 years if the interest is calculated every year. The rate of compound interest is