Logic Riddles

Question: There are 100 coins scattered in a dark room. 90 have heads facing up and 10 are facing tails up. You cannot tell which coins are which. How do you sort the coins into two piles that contain the same number of tails up coins?

Question: You have 7 tennis balls that are all identical but one of them is slightly lighter than the others.

Using a balance scale and only two separate weightings, how can you find the light tennis ball?

Question: There was a family who lived in a circle house, one day they went on vacation but they left their little boy behind. When they came back they found their little boy dead in the middle of the house. They narrowed it down to three suspects: The maid, the butler, and the chef. The maid claims she was cleaning the corners, the butler claims he was organizing the closet, and the chef claims he was making finger sandwiches.

Who killed the little boy?

Question: Can a man legally marry his widow's sister in the state of California?

Question: You get trapped in a psycho's mansion during a power outage. You try to get out by going through a series of rooms: the first one is blue, the second one is also blue, but the third one is golden. After you go through all of these rooms you find the psycho. He tells you that you must hold your breathe under water for 10 minutes, wrestle a large bear, or sit in the electric chair for ten seconds while it is on.

Which should you choose?