puzzle

/ˈpəzəl/

a particularly baffling problem that is said to have a correct solution

中文释义：难题；谜

The detective solved the puzzle by finding the hidden clue.

侦探通过找到隐藏线索解开了这个谜题。

This math puzzle requires logical thinking to find the answer.

这道数学难题需要逻辑思维才能找到答案。