Answer:
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?
How can you place a pencil on the floor so that no one can jump over it?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
What is the only question you can't answer yes to?
What is the difference between yesterday and tomorrow?
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
Logic
Animal
Difficult
Easy
Food
Funny
Kids
What am I?