Simple & Compound Interest || 20.02.2021

If the simple interest on a sum of ₹x at 6% p.a. for two years is double the simple interest on another sum of ₹y at 9% per annum for three years, then which of the following is true?

The compound interest on ₹4,000 after 3 years is ₹630.50. Then the rate of interest compounded yearly is:

Manali, deposits 1350 rupees in a bank at 5% per annum, and 1150 in another bank at 6% per annum. Find the rate of simple interest for the whole sum?

The compound interest (compounded annually) on a sum of money invested for two years is Rs.10125. If the rate of interest is 25% a per annum, then what is the amount after these two years?

A sum of ₹5000 was lent partly at 6% and partly at 9% simple interest. If the total interest received after 1 year was ₹390, the ratio in which the money was lent at 6% and 9% is

A certain sum invested on compound interest (compounded annually) grows to
Rs. 5040 in three years. If the rate of interest is 20% for the first year, 40% for the second and 50% for the third year, then what is the sum?

The difference between the compound interest and simple interest on Rs. x at 7% per annum for 2 years is Rs. 24.50. What is the value of x?

A sum of Rs. x was borrowed and paid back in two equal yearly instalments, each of
Rs. 35,280. If the rate of interest was 5%, compounded annually, then the value of x is:

A sum of money was put on compound interest for 2 years at 40% per annum. If interest were compounded half yearly then it would have fetched Rs. 568 more. Find the sum?