Answer:
Two fathers and two sons are in a car, yet there are only three people in the car. How is this possible?
What can you hold in your right hand but never in your left hand?
What can I not be tomorrow?
What can you fill a room with that takes up no space?
Dora died at a very old age on her 24th birthday. How can this be?
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?