What is another word for brain-teaser?
Pronunciation: [bɹˈe͡ɪntˈiːzə] (IPA) 
Brain-teaser is a term used to describe a problem or puzzle that requires critical thinking and mental effort to solve. Some synonyms for brain-teaser include conundrum, puzzle, enigma, riddle, and perplexity. A conundrum refers to a complex problem that is difficult to solve, while a puzzle is a problem that requires determination and patience to figure out. An enigma is a mystery that can only be solved through careful consideration and investigation. A riddle is a question or statement that has a hidden meaning, and finally, a perplexity is a problem that is confusing and hard to understand. Each of these synonyms can be used interchangeably with the term "brain-teaser" in different contexts.
