I can do you one better:
A man is caught on the King's property. He is brought before the King to be punished.
The King says, "You must give me a statement. If it is true, you will killed by lions. If it is false, you will be killed by trampling of wild buffalo."
But in the end, the King has to let the man go.
What was the man's statement?
Hope you've got your maths straight for this one!