Mr. X lent Rs. 400 to Mr. Y for 2 years and Rs. 100 to Mr. Z for 4 years and received together from both Rs. 60 as interest. What will be the simple rate of interest?

A sum becomes 4 times at simple interest in 10 years. What is the rate of interest?

A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to 8 times?

If a certain sum of money becomes doubles at simple interest in 12 years, what would be the rate of interest per annum?

If a sum of Rs. 13040 is to be repaid in two equal installments at 3.75% per annum, what is the amount of each installment?

A sum of Rs. 210 was taken as a loan. This is to be paid back in two equal installments. If the rate of the interest be 10% compounded annually, then what will be the value of each installment?

Mr. A lent Rs. 5000 to Mr. B for 2 years and Rs. 3000 to Mr. C for 4 years on simple interest at the same rate of interest and received Rs. 2200 in all from both of them as interest. What will be the rate of interest per annum?

What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?

The difference between the simple interest received from two different sources on Rs. 1500 for 3 years is Rs. 13.50. The difference between their rates of interest is ?

A person borrows Rs. 5000 for 2 year at 4% per annum at simple interest. He immediately lends it to another person at 6.25% per annum at simple interest for 2 years. What will be the amount gained by a person in the transaction per year?