Answer to yesterday's riddle: He is a priest, and he marries other couples.
I actually laughed at how many people thought he's dead! Anyway, this next one is a toughy, and isn't too intuitive. There's no trick involved (well, maybe a little) but rather a bit of thinking:
You are blindfolded and given a deck of 52 cards. You are told that exactly 13 random cards in this pack are facing up, while the other 39 are facing down. Without removing your blindfold, you must divide the deck into two piles such that both contain the same number of face-up cards. If you like, the piles need not be the same size.