Answer:
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
How many bananas can you eat if your stomach is empty?
What moves and touches water but doesn't get wet?
What is a ten letter word that starts with gas?
Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
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?