Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 10
| 2= | 81x | 8= | 15x | 6= | ||||
| 8=8 | 56x | 17+ | 5 | 20+ | ||||
| 36x | 23+ | |||||||
| 6= | 9+ | 189x | 1- | |||||
| 12x | 16+ | 4/ | 7= | |||||
| 5= | 8= | 2 | 4= | |||||
| 980x | 840x | 13+ | 21+ | |||||
| 9= | 3- | 8= | 9+ | |||||
| 3 | 144x | 3/ | 315x |
Show solution
| 2 | 9 | 7 | 4 | 8 | 3 | 5 | 1 | 6 |
| 8 | 1 | 9 | 2 | 7 | 4 | 6 | 5 | 3 |
| 1 | 3 | 6 | 9 | 5 | 7 | 2 | 4 | 8 |
| 6 | 2 | 4 | 5 | 3 | 1 | 7 | 8 | 9 |
| 5 | 4 | 3 | 1 | 6 | 9 | 8 | 2 | 7 |
| 7 | 5 | 1 | 8 | 9 | 2 | 3 | 6 | 4 |
| 4 | 7 | 8 | 3 | 2 | 6 | 1 | 9 | 5 |
| 9 | 6 | 5 | 7 | 1 | 8 | 4 | 3 | 2 |
| 3 | 8 | 2 | 6 | 4 | 5 | 9 | 7 | 1 |
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.