Answer:
How do you discover something that does not exist?
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?
The more that there is of this, the less you see. What is it?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
Railroad crossing without and cars can you spell that without any R's
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?