A man was on a flight to New York from LA. He was sitting next to a blonde lady. He decided to have some fun, so he asked the blonde to play a game.

The game went like this: he would ask a question, and if she didn't know the answer, she would pay him $10, and vise versa.

The blonde refused, and tried to take a nap, but the man, instead of giving up, said "I'll pay you $100 for every question I don't know, and you can only pay me $10. Okay?"

The blonde finally accepted.

The man asked: "Who is the leader of Russia?"

The blonde promptly handed him a $10 bill.

Then she asked: "What is black and white and runs up hills backwards?" The man pondered on this for a while, then took out his laptop and preceded to check all his references, email all his friends, and ask the question in chat rooms.

After an hour the man handed the blonde $100, then asked "What was it anyway?"

The blonde handed him a $10 bill and chuckled.