To do a certain work, the ratio of the efficiencies of X and Y is 5 : 4. Working together, they can complete the same work in 10 days. Y alone starts the work and leaves after 5 days. The remaining work will be completed by X alone in:

Some toffees are bought at the rate of 11 for Rs.10, and another batch of the same number of toffees, at the rate of 5 for Rs. 6. If the whole lot is sold at Rs.2/toffee then the gain/loss percentage, correct to one decimal place, on the whole transaction is:

A shopkeeper sold two articles. He sold one article at Rs.3175 and got 27% profit. He sold the other article at Rs.385 and got 23% loss. what is his overall gain or loss percent (correct to the nearest integer)?

A sum amounts to Rs. 7,562 in 4 years and to Rs. 8,469.44 in 5 years. at a certain rate percent per annum when the interest is compounded yearly. If Rs. 10,000 at the same rate of interest is borrowed for two years, then what will be the compound interest (in Rs.) ?