There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Find the next number in the series below

21 32 54 87 131 ?

Find the missing number in the image below.

What is the fastest way to double your money?

Find the next number in the sequence

5 12 24 36 ?

What is the centre of gravity?

Forwards I am heavy, backward I am not. What am I?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.