Answer:
What is as big as you are and yet does not weigh anything?
How do you make the number one disappear by adding to it?
10 fish are in a tank. 2 Drown, 4 Swim away, and 3 Die. How many are left?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
A man was sitting on his couch and searching for the English Channel. How did he find it?
What is always coming but never arrives?