Definition
Brainteaser questions — A brainteaser question presents an odd puzzle, a Fermi-style estimation problem, or a riddle with no immediately obvious approach. There's often no single correct number or solution; what's being observed is whether the candidate breaks the problem into steps, states assumptions out loud, and stays composed while working through something unfamiliar.
Several large tech employers, most publicly Google, scaled back brainteasers after reviewing which interview signals actually correlated with job performance and finding structured behavioral and technical questions did better.
They haven't disappeared entirely; some interviewers still use a lighter version specifically to watch a candidate's problem-solving process under a bit of pressure, rather than to test any particular piece of knowledge. When one does come up, the expected move is to think out loud, not to freeze while searching for a hidden correct answer.
Frequently asked questions
Are brainteaser questions still common in interviews?
Less than they once were. Several large employers moved away from them after finding they didn't predict job performance as reliably as behavioral and technical questions, though some interviewers still use a lighter version to observe reasoning.
Is there always a correct answer to a brainteaser?
Often not. Many brainteasers, especially estimation problems, are graded on the reasoning process and stated assumptions rather than landing on one specific number.
What's the best way to answer one?
Think out loud. State an assumption, break the problem into smaller steps, and keep talking through the logic rather than going quiet while searching for a hidden trick.
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