Blonde Joke- Star if funny!?

A business man boards a plane and finds that his seat is right next to that of a blonde. He decides to have a little fun and make some cash in the process, so he sits down and starts talking to her. "Would you like to play a game? Every time I ask you a question and you don't know the answer, you give me $5. Every time you ask me one I can't answer, I'll give you $100 dollars."

The blonde agrees, and the business man asks the first question. "What is the average atomic mass of the three most abundant carbon isotopes?" The blonde purses her lips, but has no idea what the answer is. She hands him five dollars. "You're turn," he announces with a grin.

"Okay. What is red and yellow and goes up a hill with three legs and goes down with four?" the blonde asks him. The man sits, deep in thought for ten minutes. He gets out his cell phone and calls many of his colleagues. Unable to find the answer, he opens up his laptop and searches the internet for nearly an hour. Finally, he turns to the blonde and says, "I give up." He hands her $100. She smiles.

"My turn," says the business man. "What is it that is red and yellow, and goes up a hill with three legs and down with four?"

The blonde smiles and hands him five dollars.

=D

I love this one, one of the best blonde jokes ever! Star if you agree! ♥