On what sum will the compound interest at 5% per annum for 2 years compounded annually be Rs 164?

Simple interest on a sum of money for 2 years at 6% per annum is Rs. 5200. What will be the compound interest on the sum at the same rate for the same period.

What will be the compound interest at the rate of 5% per annum for 3 years on that principal which in 3 years at the rate of 5% per annum gives Rs. 1200 as simple interest,

Find the principal if the interest compounded annually at the rate of 10% for two years is Rs. 210.

A sum amounts to Rs. 756.25 at 10% per annum in 2 years, compounded annually. Find the sum .