When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

How many bananas can you eat if your stomach is empty?

How many letters are in the alphabet?

If 1+9+8=1, what is 2+8+9?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What work can one never finish?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?