At what annual percentage rate, 10 years of simple interest on an amount will be  of the addition?

A certain sum of Rs.4200 becomes Rs5523 at 11% p.a simple interest in a certain time. What is the simple interest on the sum of Rs. 4800 at the same rate and in same time period?

A sum of ₹ 3000 yields an interest of ₹ 1080 at 12% per annum simple interest in how many years ?

A principal increase by 50 percent in five years at the rate of simple interest. What will be the compound interest for 3 years at Rs 20,000 with the same interest rate?

The difference between simple interest and compound on Rs. 1200 for one year at 10% per annum reckoned half-yearly is:

The simple interest on an amount at the rate of 13.5 p.c.p.a. for 10 years is Rs. 765.45. What is the sum?

If the simple interest on ₹ 1 for 1 month is 1 paisa, then the rate percent per annum will be 

The simple interest and the true discount on a certain sum for a given period and at a given rate are 25 and 20 respectively. The sum is