Two men are in a desert. They both have packs on. One of the guys is dead. The guy who is alive has his pack open, the guy who is dead has his pack closed. What is in the pack?
A parachute (that didn't open)
Một ly thuỷ tinh đựng đầy nước, làm thế nào để lấy nước dưới đáy ly mà không đổ nước ra ngoài?
Dùng ống hút