10 Mind Puzzles You Can Play On Your Friends
Richard Wiseman, psychologist and magician, has acted out 10 bets you can always win with your friends. Each one is essentially a combination of mind puzzle and physics. For instance, you can draw an arrow on a post-it note and challenge your friends to reverse the direction of the arrow without touching the paper. To win the bet you simply slide a glass of water in front of it, creating the illusion that the arrow’s direction has changed.