Sixty-five percent of a number is 21 less than four-fifth of that number. What is the number ?

An article when sold at a gain of 5% yields TK. 15 more than when sold at a loss of 5% . Its cost price would...

An express train travelled at an average speed of 100 km/hr, slopping for 3 minutes after every 75 km. How lon...

If 18 pumps can raise 2170 tonnes of water in 10 days , working 7 hours a day ; in how many days will 16 pumps...

To fill a tank , 25 buckets of water is required. How many buckets of water will be required to fill the same...

A man can do a piece of work in 5 days. But with the help of his son, he can do it in 3 days . In what time ca...

Tow workers A and B are engaged to do a work . A working alone takes 8 hours more to complete the job than if...