Simple Interest Questions and Answers

A sum was put at simple interest at a certain rate for 2 years. had it been put at 3 % higher rate. It would have  fetched Rs. 72 more. The sum is :

In how many years will a sum of money double itself at 12% per annum ?

If a sum of money doubles itself in 8 years at simple interest, the rate percent per annum is :

If a sum of money at simple interest doubles in 6 years, it will become 4 times in :

At a certain rate of simple interest, a certain sum doubles itself in 10 years. It will treble itself in :

The simple interest on a sum of money at 8% per annum for 6 years is half the sum. The sum is

A sum of money trebles itself in 15 years 6 months. In how many years would it doube itself ?

What annual payment will discharge a debt of Rs. 580 due in 5 years, the rate being 8% per annum?

The simple interest on a sum of money will be Rs. 600 after 10 years. If the principal is trebled after 5 years, what will be the total interest at the end of the tenth year ?

The rate of interest on a sum of money is 4% p.a. for the first 2 years 6% p.a. for the next 3 years and 8% p.a. for the period beyond 5 years. If the simple interest accured by the sum for a total period of 8 years is Rs. 1280, what is the sum ?