A person deposited ₹15,600 in a fixed deposit at 10% per annum simple interest. After every second year he adds his interest earned to the principal. The interest at the end of 4 years is:

The price of milk is increased by 25%, by what percentage should a housewife reduce the use of milk in her house so that there is no increase in her monthly expenditure?

By selling an article for ₹72, there is a loss of 10%. At what price it should be sell to gain 10% profit?

A certain sum is lent at 4% p.a. for 3 years, 8% p.a. for the next 4 years, and 12% p.a. beyond 7 years. If for a period of 11 years, the simple interest obtained is ₹27,600, then the sum is (in ₹):

₹ 1,000 is invested at 5% per annum simple interest. If the interest is added to the Aprincipal after every 10 years, the amount will become 2,000 after

A and B together can do a piece of work in 12 days, A and C together can do the same work in 15 days. If B and C together can do the same work in 20 days, then in how many days A, B and C together can complete the same work?

An article is sold for Rs. 1,260 after giving a discount of 40%. What is the marked priced of this article?

A single discount equivalent to the successive discounts of 10%, 20% and 25% is