₹31,250 amount to ₹35,152 at a certain rate of interest in 1½ years when the interest is calculated half yearly. What is the rate of interest per annum?

At what rate of compound interest per annum will a sum of ₹1,200 becomes ₹1,348.32 in 2 years?

If the compound interest on a sum for 2 years at 12½% per annum is ₹340, then the simple interest on the same sum at the same rate for the same period of time is

There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest (in ₹) on ₹12,000 after 3 years at the same rate of interest?

If the difference between compound interest and simple interest on a sum of money in 2 years at 10% annual interest rate is ₹12, then find the amount.

A sum of money lent at compound interest for 2 years at 20% per annum would earn ₹482 more, if the interest was payable half yearly than if it was payable annually. The sum is