Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 89
| 144x | 1- | 9= | 4= | |||||
| 336x | 210x | 4= | 6= | 2- | ||||
| 27x | 48x | 9+ | ||||||
| 4= | 8= | 21x3 | 7= | 12+ | 210x | |||
| 90x | 4= | 11+ | 1=1 | 6= | ||||
| 4= | 360x5 | 7= | 9=9 | |||||
| 1= | 12+ | |||||||
| 252x | 14+ | 6= | 4= | 27x | 23+ | 19+ | ||
| 6= | 4+ | 18+ |
Show solution
| 6 | 7 | 8 | 3 | 5 | 1 | 2 | 9 | 4 |
| 8 | 1 | 9 | 2 | 7 | 4 | 6 | 5 | 3 |
| 3 | 9 | 2 | 1 | 8 | 5 | 4 | 6 | 7 |
| 4 | 8 | 3 | 7 | 6 | 9 | 1 | 2 | 5 |
| 5 | 3 | 7 | 8 | 4 | 2 | 9 | 1 | 6 |
| 1 | 6 | 4 | 5 | 2 | 8 | 7 | 3 | 9 |
| 7 | 2 | 1 | 9 | 3 | 6 | 5 | 4 | 8 |
| 2 | 5 | 6 | 4 | 9 | 7 | 3 | 8 | 1 |
| 9 | 4 | 5 | 6 | 1 | 3 | 8 | 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.