In how many years will be Rs. 2,000 amounts to Rs.2,420 at 10% per annum compound interest ?

If the amount is times the sum after 3 years at compound interest compounded annually, then the rate of interest per annum is 

What will be the compound interest on a sum of Rs 7500 at 4 % in 2 years?

A sum of Rs 5,000 amounts to Rs 7,200 in 8 years at a certain rate percent p.a, interest compounded yearly. What will be the compound interest on a sum of Rs.6,550 in 4 years at the same rate of interest?

What is a difference between simple interest and compound interest in 1 year at a rate of 10 percent on an amount of Rs. 1200. If interest is half yearly compounded?

The sum for 2 years gives a compound interest of ₹ 3225 at 15 % rate. Then sum is 

In how much time compound money at compound interest of half yearly rate of Rs 800 will be Rs 926.10?

There is 80% increase in amount in 5 years at simple interest. What will be the compound interest of Rs. 20,000 after 3 years at the same rate?