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Brain Teasers

Classic puzzles, carefully explained. Each teaser has an optional hint and a hidden answer, so you decide when to give up.

The explanation matters more than the answer: we show why the solution works and what kind of thinking unlocks it.

Three light switches on a wall beside a closed door, with a glowing bulb drawn behind the doorBrain Teaser

The Three Switches and One Light Bulb

Brain TeasersMindSteal Editorial Team

Three switches, one bulb behind a closed door, and only one chance to look. Can you work out which switch is which? Most people miss the clue that isn't about light.

More in Brain Teasers

  • Two tall doors side by side, each with a guard figure in front, one guard marked with a tick and the other with a crossBrain Teaser

    The Two Doors and Two Guards Puzzle

    Brain TeasersMindSteal Editorial Team

    One door leads to freedom, one to doom. One guard always lies, one always tells the truth, and you get one question. What do you ask? A logic classic, fully explained.