Answer:
How do you make the number one disappear by adding to it?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
When you put this in a heavy wooden box the box will become lighter
Three doctors said that Bill was their brother. Bill said he had no brothers. Who was lying?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
It is something you will never see again.