A sum becomes its double in 15 years. Find the annual rate of simple interest:

A shopkeeper bought candy at 10 for a rupee. How many for a rupee must he sell to gain 25%?

Simple interest of Rs. 20000 for 8 years at 6% PA is equal to the simple interest on Rs. 16000 at 3% PA for a fixed period. The time period is

Hari sells 6 eggs at Rs. 24. He buys 10 eggs at Rs. 30. What is his profit or loss%?

P can lay railway track between two given stations in 15 days and Q can do the same job in 10 days. With help of R, they did the job in 4 days only. Then, R alone can do the job in:

\(x\%\) of \(x\) is the same as 20% of

Mohan is on tour and he has Rs. 75 for his expenses. If he exceeds his tour by 4 days he must reduce daily expenses by Rs. 5. The number of days of Mohan's tour programme is-

The average of the four consecutive odd numbers is 16. What is the difference between fourth and first?

A can do a piece of work in 20 days, which B can do in 16 days. B worked at it for 8 days. A can finish the remaining work in: