There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

If eleven plus two equals one, what does nine plus five equal?

What is the relationship between these matchstick pictures below?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

What is the centre of gravity?

John was piloting a plane behind a car but was never able to overtake it. Why?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?