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Brain Teasers

Small puzzles of logic, numbers and words that reward slow, careful thinking. Type your answer, and after each one the game explains why the answer works.

How to play

Brain teasers are short puzzles you crack with reasoning, not trivia. Some are logic or number puzzles, some play with letters, and the trick questions test whether you notice what is really being asked. When you solve one, or give up, the game shows the answer with a short explanation.

  1. Pick a kind under Category, or stay on Mixed.
  2. Work it out, on paper if that helps, and type your answer.
  3. Press Check. Type numbers however you like, 5 or five.
  4. Take a Hint if you're stuck, or press Show answer to see the solution.
  5. Read the explanation, then press Next brain teaser.

Controls

  • Category: Mixed, Logic, Math, Trick questions or Word.
  • Type in Your answer, then press Check or Enter.
  • Hint nudges you toward the method. Show answer reveals the answer and the reasoning behind it.
  • Next brain teaser deals a new one. Streak and Best track your run.
  • Pass the phone makes it a group game for 2 to 6 players with +1 points.

Tips

  • When an answer comes to you instantly, test it before you press Check: put it back into the question and see if every condition still holds.
  • For Logic and Math, write down what you know. A short list or a quick sketch turns a tangled sentence into simple steps.
  • Trick questions are about reading, not sums. Look for the one word that changes everything, or the thing the question quietly assumes.
  • Word teasers play with letters: try rearranging them, turning them upside down or saying them out loud.
  • Read the explanation even when you're right. The same idea tends to come back in a new form.

FAQ

Do I need to be good at math?

No. The math teasers use school arithmetic, and the hard part is reading carefully. If numbers aren't your thing, start with Word or Trick questions.

Can I use these brain teasers in class?

Yes. Put one on the board, give everyone a minute on paper, then press Show answer and go through the explanation together. For a contest, Pass the phone keeps points for up to six teams.

Is it free, and will it run on a Chromebook?

Yes, it's free and needs no account, and it runs in a browser tab with nothing to install, so Chromebooks are fine. If a school or office network blocks the site, only that network's IT team can change it.

Play Brain Teasers on lifesim.com →

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