Simple & Compound interest

The difference between simple and compound interest on Rs 1,000 for 3 years at 5% p.a. interest is:

Find the difference between the simple and compound interest on Rs. 8000 for 3 years at 5 percent.

What is the difference between the simple and compound interest on ₹7,300/- at the rate of 6 p.c.p.a in 2 years?

The difference between simple and compound interest on Rs. 6000 for 1 year at 20% per annum reckoned half yearly is :

The difference between simple and compound interest for the fourth year is ₹ 7280 at 20% p.a. What is the principal

The difference between simple and compound interest compounded annually, on a certain sum of money for 2 years at 4% per annum is Re 1. The sum (in Rs.) is: