Funny riddles

If 20 blackbirds are on a fence and you shoot one, how many remain?

A man came to visit at a convent while the superior mother was out of town. He left before she returned, and was careful to leave nothing behind. The nuns said nothing about his visit, so how did the superior mother figure out that a man had been there?

If you see a bird sitting on a twig, how could you get the twig without disturbing the bird?

What bird can write?

One day a boss said to her employees, "I can fight and beat any man who works here." A new employee, a seven-foot-tall ex-prize fighter, stood up to take on the boss. The boss kept her word, but did not beat the man or back down. What did the boss do?

Four jolly men sat down to play, and played all night till break of day. They played for gold and not for fun, with separate scores for every one. Yet when they came to square accounts, they all had made quite fair amounts! Can you the paradox explain? If no one lost, how could all gain?

Why do birds fly south in the Fall?

How do you get to Carnegie Hall?

The red house is on the white street, and the blue house is on the red street. Where is the white house?

What did the boy cat say to the girl cat on Valentine's Day?