noun
- a puzzle or problem that requires clever thinking to solve
Examples
- The math teacher gave us a challenging brainteaser to work on over the weekend.
- She loves solving brainteasers in her spare time.
- The job interview included several brainteasers to test problem-solving skills.
- This crossword puzzle is quite a brainteaser.
- The children enjoyed the brainteasers in their activity book.
- He stumped everyone with his clever brainteaser about the three doors.