Answer:
If four people can repair four bicycles in four hours, how many bicycles can eight people repair in eight hours?
What is black when it is clean and white when it is dirty?
This could make wooden boy's noses grow.
Children keep their assets in this.
Small and bearded, both in the real world and in stories.
They try to beat me, they try in vain. And when I win, I end the pain.
Kids
Animal
Difficult
Easy
Food
Funny
Logic
What am I?