Rachit invests ₹12,000 for a 2-year period at a certain rate of simple interest per annum. Prasad invests ₹12,000 for a 2- year period at the same rate of interest per annum as Rachit, but in Prasad's case the interest is compounded annually. Find the rate of interest per annum if Prasad receives ₹172.80 more as interest than Rachit at the end of the 2-year period. 

A sum of money becomes eight times of itself in 3 years at compound interest. The rate of interest per annum is 

What will be the difference between the compound interest and simple interest of 2 years at the rate of 5 percent annual interest at Rs. 4,000?

Find the compound interest to the nearest rupee on Rs. 7500 for 2 years 4 months at 12% p.a reckoned annually?

Anu invested Rs. 15000 at the rate of interest 10% p.a. for one year. If the compound interest is compounded at every six months, what amount will Anu get at the end of the year?

What is the compound interest on a sum of ₹25,000 after three years at a rate of 12 per cent per annum interest compounded yearly?  

A sum of money becomes double in 3 years at compound interest compounded annually at the same rate. In how many years will it become four times of itself? 

The difference between the compound interest (compounded annually) and simple interest on a sum of money deposited for 2 years at 5% per annum is Rs. 15. What is the sum of money deposited?