Answer:
What is yours but only used by others?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
What can you stick between a 3 and a 4 so that the result is more than three but less than four?
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time 200 years. Why did he go downstairs?
Why was the cook arrested?