Riddle:
A psychologist goes to a village in Africa and decides to compare foot size to intelligence. He notes that in general, as foot size increases, so does intelligence. How can this be?
Answer: He is measuring everyone's feet, including the feet of the very small children. So the statistics will show that larger feet belong to the smarter people, the adults.
Riddle:
A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven't eaten in 3 years. Which room is safest for him?
Answer: The third. Lions that haven't eaten in three years are dead.
Riddle:
A rubber ball is tossed off the top of a 90 foot building. Every time it bounces, it goes back up half way. How many bounces will the ball take before it stops?
Answer: The answer is infinite, in a gravity free world. But of course gravity will eventually stop it.