This riddle sounds like it should have a strange biological answer:
What has 13 hearts but no other organs?
The answer is a deck of playing cards.
A standard deck contains 13 cards in each suit, including 13 hearts. Those hearts are symbols on cards, not real organs, which is what makes the riddle work.
The question pushes you toward thinking about living creatures, but the word “hearts” has more than one meaning. Once you think of card suits, the answer becomes clear.
Answer: A deck of playing cards.
It is a simple wordplay riddle, but it often catches people because the wording makes the biological interpretation feel obvious at first.
