Quick Thinking
Riddle: An old billionaire offers a million-dollar prize to whoever can guess what he is thinking of. Plenty of people tried but they old got it wrong, until one young boy came up. Soon after, the boy walked away a millionaire. What did he guess?
Answer: The boy said, "You are thinking of something you thought I wouldn't guess". The boy was right by technicality.
Source: https://www.riddles.com/9511
