Answer:
What should you do when you see a green man?
What instrument can you hear but never see?
When is 1500 plus 20 and 1600 minus 40 the same thing?
They are two brothers. However much they run, they do not reach each other.
Often found in doctor's offices and pirate flags
If you count 20 houses on your right going to the store and 20 houses on your left coming home, how many houses did you count?