If 2x - y = 4 then 6x - 3y = ?

If x = y = 2z and xyz = 256 then what is the value of x?

(1/10) 18 - (1/10)20=?

The length of a rectangle is increased by 25%. What percentage should the width be decreased so that the area...

A goat is tied to one corner of a square plot of side 12m by a rope 7m long. Find the area it can graze?

Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requ...

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been...