Answer:
When you put this in a heavy wooden box the box will become lighter
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
What coin doubles in value when half is deducted?
How do you make the number one disappear by adding to it?
A train just leaves a station and enters a tunnel. Where is the best place for a claustrophobic person to sit?
Often cooked as fillet, this meat comes from an animal that swims underwater.