riddle (n)

I could not answer Wendy’s riddle, but it made me laugh.
The Sphinx presented a challenging riddle to those who sought entry to the ancient city.
He enjoyed crafting riddles that stumped even the most intelligent individuals.
The comedian amused the audience with a clever and amusing riddle during the show.
The detective pondered the crime scene, trying to unravel the riddle left by the perpetrator.