Who Is Wearing A Hat ? - tricky Puzzle
Answer: Both Alex and Carl are wearing hats.
Explanation: Answer: Both Alex and Carl are wearing hats. Reason: As per given information we understand that, Bob is not wearing a Hat, Carl is wearing a hat. Now if Alex doesn't wear a Hat, than Bob must wear a Hat. But he is not wearing a Hat. So it implies Alex is also wearing a Hat. So Alex and Carl are wearing hats.