Answer:
A town has only two barbers. One of the barbers has a nice, tidy haircut, and the other has a shaggy, messy haircut. Which barber should you go to?
When is homework not homework?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
What can you fill a room with that takes up no space?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
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?