The Five-Straw Puzzle
You are supplied with five straws of equal length (about three and a half inches), and you are required to lift all five, holding only the tip of one of them. A glance will show you the arrangement of the five little straws and the coin in their centre, which is, as will be seen, as simple as possible—when you know it. The use of the coin is an optional addition. It wedges all tight, and prevents the straws slipping when once put together; but it is by no means indispensable.