Blonde and a Lawyer play a game of intelligence

A blonde and a lawyer are sitting next to each other on an airplane. The lawyer is badgering the blonde to play a game of intelligence, but the blonde keeps refusing. The lawyer offers her 100 to 1 odds explaining to her that if she can't answer one of his questions she has to give him $5 and if he can't answer one of hers he will give her $500. The blonde finally agrees.

The lawyer went first and asked the blonde, "What’s the top number of a fraction called?"

The blonde didn't answer and instead just gave the lawyer $5.

Now it was the blonde's turn to ask the lawyer a question. She asked him, "What goes up a hill with 3 legs and comes back down the hill with 4 legs?"

The lawyer has know idea what the answer is despite scouring the net and even making some air to ground calls. After hours of research, he gives up and gives the blonde her $500.

The lawyer was so upset he didn't know the answer and asked the blonde if she could tell him.

She didn't answer, just handed him $5.