My mind was full of riddles when I wrote up these puzzles!
Please remember, I don't want you to ruin the puzzle for anyone in the comments section so if you want to solve this, send me an e-mail or ping over Twitter so we can sort out the details. Thanks!
10 philosophers meet and one decides to make a bet. He says he will put all his ten 100 euro bills in a basket. Then each of the philosophers will take one and only one 100 euro bill. He will be the last one. After he takes his bill, the basket will still have a 100 euro bill inside. If he succeeds, the other philosophers will need to pay him 100 euro each. If he doesn't succeed, he needs to give them the money. What is he going to do?