Answer:
When is homework not homework?
How could all of your cousins have an aunt who is not your aunt?
What is the difference between yesterday and tomorrow?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
I have two coins, one is marked George I and one is marked George IV. One is genuine but one is a forgery. Which is the forgery?
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.