Answer:
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?
Three doctors said that Bill was their brother. Bill said he had no brothers. Who was lying?
What coin doubles in value when half is deducted?
A man is twenty years old but has only had five birthdays. How is that possible?
Dora died at a very old age on her 24th birthday. How can this be?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?