Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in :

Find the least number exactly divisible by 12, 15, 20 and 27.

In a 100m race, A beats B by 10m and C by 13m. In a race of 180m, B will beat C by

The price of tea being increased by 20%, a man reduces his consumption by 20%. By how much percent will his ex...

A motorist travels to a place 150 km away at an average speed of 50 km and returns at 30 km per hour. His aver...

Four years ago, the father's age was three times the age of his son. The total of the ages of the father and t...

If the length of rectangle A is one-half the length of rectangle B, and the width of rectangle A is one-helf t...