Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 99
| 12x | 4= | 105x | 8= | |||||
| 8= | 5= | 270x | 84x7 | 9= | ||||
| 9x | 14x | 1= | 21+ | 6 | 4= | |||
| 63x | 4/ | 8= | 4= | 3= | ||||
| 4/2 | 6= | 9= | 8+ | 11+ | ||||
| 8+ | 1 | 7+ | 16+ | |||||
| 16+ | 162x | 210x | 6= | 48x | ||||
| 576x | 36x | 7= | 8= | 9= | 5= | |||
| 5= | 14x | 2= |
Show solution
| 6 | 1 | 4 | 9 | 2 | 3 | 7 | 5 | 8 |
| 2 | 8 | 5 | 3 | 4 | 7 | 6 | 1 | 9 |
| 9 | 2 | 7 | 5 | 3 | 1 | 8 | 6 | 4 |
| 1 | 7 | 9 | 2 | 8 | 4 | 5 | 3 | 6 |
| 7 | 5 | 2 | 8 | 6 | 9 | 3 | 4 | 1 |
| 5 | 3 | 8 | 6 | 1 | 2 | 4 | 9 | 7 |
| 4 | 9 | 1 | 7 | 5 | 6 | 2 | 8 | 3 |
| 3 | 4 | 6 | 1 | 7 | 8 | 9 | 2 | 5 |
| 8 | 6 | 3 | 4 | 9 | 5 | 1 | 7 | 2 |
Solver Notes
Our classic mathdoku puzzles mix all four operations (addition, subtraction, multiplication, division) just like the original KenKen format.
What makes a mathdoku puzzle classic?
Classic mathdoku uses cages with any of the four arithmetic operations, matching the original KenKen-style puzzle format.
Are classic mathdoku puzzles good for beginners?
Start with the 4x4 classic grid — it's the easiest entry point into the full mathdoku experience.
Where can I print classic mathdoku?
Every puzzle page on Freemathdoku.com has a Print button that generates a clean PDF with the answer key.