How Can You Take Out a Ping-Pong Ball Fallen in a Pipe?
Solve this brainteaser with all the logic you have. Your last good Ping-Pong ball fell down into a narrow metal pipe imbedded in concrete one foot deep. How can you get it out undamaged? If all the tools you have are your tennis paddle, your shoe-laces, and your plastic water bottle, which does not fit … Read more