Ok, here is the smart blond.
A blonde is sitting on a plane waiting for it to depart, when a lawyer-looking guy comes and sits next to her. While she is trying to catch some zzz's, the guy next to her leans over and says, 'Do you want to play a game? We'll ask each other questions and if we don't know the answer to each others questions, we'll hand over $5.'
She replies, 'No thank you, I'd like to get some sleep.'
The blonde is almost asleep when he says back to her, 'O.K. I'll give you $50 for every question I get wrong, and you only have to pay $5.' Again the blonde declines, she really just wanted to catch some shut-eye.
The blonde is amost asleep again when the lawyer again bothers her, only this time the offer was bumped up to $100 vs $5. The blonde, realizing that he isn't going to let her get any sleep unless she plays his dumb game, gives in and agrees to it.
He asks her the first question, 'What is the distance from the Sun to the Earth?' She pauses for a second and then reaches over into her purse, pulls out $5, and hands it to him.
'Now it's my turn,' she says. 'What is black and white, goes up a hill with three legs and comes back down with four?'
The man is truly puzzled at the question. He pulls out his laptop, gets on the Web pulls a google search, checks on wikipedia but can't find the answer. He gets out his cell phone and calls all his friends and family, not only does no one know the answer, they haven't even a guess for him. He goes back online and emails all his connections, and still, no one knows the answer. After an hour, he finally looks over and taps the blonde on the shoulder to wake her up, and says, 'You got me. I tried everyone I possibly could and no one knows the answer. Here you go, you deserve the $100.'
She accepts it and says thank you, turns over and goes back to her nap.
He looks at her and says, 'Well, what's the answer?!' She reaches into her purse and hands him a $5 bill, and goes back to sleep.