Play Mathdoku (KenKen) Online Free

Play Mathdoku (KenKen) online for free. Fill the 9×9 grid so each row and column contains 1-9. Cages show arithmetic operations — no 3×3 box constraint.

▶ Play Mathdoku (KenKen) — Free
🟢 Easy 🟡 Medium 🟠 Hard 🔴 Expert

How to Play Mathdoku (KenKen)

  1. Fill every row with digits 1-9, no repeats.
  2. Fill every column with digits 1-9, no repeats.
  3. NO 3×3 box constraint — cages replace boxes.
  4. Each cage shows a target number and operation (+, −, ×, ÷).
  5. Digits in a cage must produce the target using that operation.
  6. Digits CAN repeat in a cage if they're in different rows and columns.
💡 Pro Tip
Subtraction and division cages are always 2 cells. Small cages with × or ÷ often have few valid combinations.

Frequently Asked Questions

What's the difference between Mathdoku and Sudoku?

Mathdoku (KenKen) replaces the 3×3 box constraint with arithmetic cages. Instead of boxes, you use addition, subtraction, multiplication, and division targets to determine digit placement.

Try More Puzzle Modes

🧩Killer Sudoku 🧩Futoshiki 🧩Classic Sudoku
▶ Play Mathdoku (KenKen)