The object:
A person who two sums of money either side of them, one is real money, the other is fake (although you CAN'T...you just CAN'T tell the difference). You offer them a sum of money, and see if they would accept it.

E.g:

You have $1000 to your left and $100000 to your right, and I offer you $5000...DEAL OR NO DEAL?

oh so like...wait. what?

already kc.

Ah. I get it.

You have 4,000 on your left and 1 million on your right. I offer you 6000. Deal or no deal?

And, of course, one of the sets of money are (is) fake, so it's not as easy as you think.

this is just like that game..

You have $1 on your left hand $1000,000,000,000,000.99 on your right and I offer you $10. Deal or no deal?