There are six boxes containing 5, 7, 14, 16, 18, 29 balls of either red or blue in colour. Some boxes contain only red balls and others contain only blue.

One sales man sold one box out of them and then he says, "I have the same number of red and blue balls left over."

Which box is sold out?

He's sold the box of 29.
Now the 14 and 16 are one colour, the 5, 7, 18 are the other colour.

Posted by Dave Cheetham on 2003-08-17 12:26:48