upon a time lived a man who had three sons and
An old car.
He decided to buy a new car for himself and give the old car
to one of his sons.
He also decided that the car should go to the son who has the
sharpest mind and the quickest reflexes.
So, this is what he did. He showed them two white hats and
three black hats. Then he told them to keep their eyes shut, chose
three hats, and put them on their heads. He told them to open
their eyes and look at each other. The first one who guesses
the color of the hat on his head is the one who will get the
After few seconds one of the sons said: "Black!"
The father presented him with the car keys .
How did this son guess the color of the hat he was wearing?