The difference between a number and its two-fifth is 510. What is 10 percent of that number?

The profit earned by selling an article for Tk. 832 is equal to the loss incurred when the same article is sol...

The ratio of three numbers is 3 : 4 : 7 and their product is 18144. The numbers are :

P and Q started a business investing Tk. 85,000 and Tk. 15,000 respectively. In what ratio the profit earned a...

A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same...

Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in ho...

An athlete runs 200 metres race in 24 seconds. His speed is :