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Broken Calculator

A puzzle game where the calculator doesn't work right. Figure out each level's hidden rule and reach the target number.

ReactTypeScriptGame
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Level 1 of Broken Calculator: a target of 50, a Show Hint button, and the calculator keypad.
Level 1: reach 50 with a calculator that doesn't quite work.
About

What it does

Each of the 20 levels quietly changes your results with a hidden rule, from off-by-one and reversed digits to swapping + and ×, digital roots, Collatz steps and Kaprekar's routine. Work out the pattern from what the calculator does, then use it to hit the target. Levels unlock in order and your progress is saved.

  • +20 levels from easy to hard
  • +Plays in the browser
Next
Clance →Claude Code, one hotkey away, anywhere on your Mac. A menu-bar app that pops up the real Claude Code CLI over whatever you're doing, and has grown into my main dev app and agent manager.