Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 8
| 4= | 6x | 28+ | 8 | 6= | ||||
| 25+ | 2= | 7= | 8= | 5= | 3= | 9= | 1= | |
| 1= | 7= | 4- | 7+2 | 9=9 | ||||
| 21+ | 18x | 5= | 8= | 96x | ||||
| 9/ | 7= | 4/ | ||||||
| 5x | 14+ | 6= | 14x | |||||
| 19+ | 1= | 3= | ||||||
| 216x | 21+ | 9 | 30x | 19+ | ||||
| 28+ | 12x | 16+ |
Show solution
| 5 | 4 | 2 | 3 | 1 | 7 | 9 | 8 | 6 |
| 6 | 2 | 7 | 8 | 5 | 4 | 3 | 9 | 1 |
| 8 | 6 | 1 | 7 | 3 | 5 | 2 | 4 | 9 |
| 4 | 9 | 3 | 5 | 7 | 8 | 1 | 6 | 2 |
| 3 | 5 | 6 | 2 | 9 | 1 | 4 | 7 | 8 |
| 9 | 1 | 5 | 4 | 8 | 6 | 7 | 2 | 3 |
| 7 | 8 | 9 | 1 | 2 | 3 | 6 | 5 | 4 |
| 2 | 3 | 8 | 6 | 4 | 9 | 5 | 1 | 7 |
| 1 | 7 | 4 | 9 | 6 | 2 | 8 | 3 | 5 |
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.