Calcudoku: Math Logic Puzzle

Calcudoku is the math logic puzzle where arithmetic meets sudoku. Fill an N x N grid with the numbers 1 to N so that no number repeats in any row or column. Thick lines group the cells into cages, and each cage shows a target and an operation: add, subtract, multiply or divide. Make every cage hit its target and the grid is solved.

It's the perfect puzzle for a coffee break or a long commute: easy to learn, deep enough to keep you thinking for years.

WHY YOU'LL LIKE IT
- 560 levels that ramp from 3x3 starter grids to 9x9 expert puzzles
- A new daily puzzle every day, with a streak to keep going
- Every puzzle is checked by a solver: exactly one solution, and you can always reach it by logic. No guessing.
- Hints that explain the next step ("the 12x cage can only be 3x4 here...") instead of just filling in a number
- The cage helper lists the number sets that still fit the selected cage
- Pencil marks that clear themselves when you place a number
- Conflict highlighting for repeated numbers and cages that don't add up
- Unlimited undo, a timer you can hide, and a calm dark mode
- Three short tutorial puzzles teach the rules in a minute
- Plays offline

HOW TO PLAY
- 7+ means the cells add up to 7
- 2- means the two cells differ by 2
- 12x means the cells multiply to 12
- 3÷ means one cell divided by the other is 3
- A one-cell cage gives you its number
- A number may repeat inside a cage, as long as the repeats aren't in the same row or column

Calcudoku is free to play with optional ads. A single purchase removes them.

Made by Spark & Spiral Software, the makers of Crowns and Daily Logic Puzzles.

Recent changes:
New: today's leaderboard. Race other players on the daily puzzle and set your player name in Settings.