A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank what time ?

If p-q=3 and p^2+q^2 = 29, find the value of pq.

If m and n are whole numbers such that m^n = 121, the value of (m-1)^n+1 is

A culprit was spotted by a policeman from a distance of 250 meter. When the policeman started running towards...

A shopkeeper sells a pair of sunglasses at a profit of 25%. If he had bought it at 25% less and sold it for Tk...

A tea merchant blends 2 kinds of tea, putting in 3 parts of a Tk. 25 per kg grade to 1 part of a Tk. 15 per kg...

A man has Tk. 210 in coins alone. The coins consist of one taka, 50 paisa and whose numbers form a ratio of 5...