Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 57
| 7= | 2 | 28+ | 11+ | |||||
| 12+ | 324x | 3= | ||||||
| 9= | 10+ | 64x | 8= | 18x | 13+ | |||
| 7= | 14+ | |||||||
| 15+ | 270x | 9+ | 90x | 8= | ||||
| 4 | 18+ | 2= | ||||||
| 96x | 22+ | 2= | 4= | 189x | ||||
| 9= | 7= | 5= | 48x | |||||
| 6=6 | 4= | 5 | 9+ | 70x | 18+ | 2= |
Show solution
| 7 | 2 | 1 | 4 | 8 | 9 | 3 | 5 | 6 |
| 1 | 8 | 4 | 7 | 9 | 2 | 6 | 3 | 5 |
| 9 | 5 | 2 | 8 | 3 | 6 | 7 | 4 | 1 |
| 2 | 3 | 8 | 9 | 6 | 5 | 1 | 7 | 4 |
| 5 | 7 | 3 | 6 | 1 | 4 | 2 | 9 | 8 |
| 3 | 1 | 6 | 5 | 4 | 7 | 8 | 2 | 9 |
| 8 | 6 | 9 | 2 | 5 | 3 | 4 | 1 | 7 |
| 4 | 9 | 7 | 1 | 2 | 8 | 5 | 6 | 3 |
| 6 | 4 | 5 | 3 | 7 | 1 | 9 | 8 | 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.