A sum doubles itself in 2.5 years at compound interest. In how many years will it become eight times?

A sum of money invested at simple interest triples itself in 8 years and becomes n times in 20 years. What is the value of n?

At what simple interest rate percent per annum will a sum of money double in 8 years?

A sum of money invested at compound interest amounts to Rs 4624 in 2 years and to Rs 4913 in 3 years. The sum of money is

There is 50% increase in an amount in 5 years at simple interest. What will be the compound interest of ₹ 12,000 after 3 years at the same rate?

Difference between compound interest and simple interest on ₹10,000 for 2 years at 10% p.a.