Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 70
| 1- | 432x | 3= | 56x | |||||
| 1= | 8= | 252x | 9= | 1- | ||||
| 2= | 7= | 1= | 9 | 14+ | 8= | 30x | 3= | |
| 4x | 4- | 5= | 22+ | |||||
| 19+ | 189x | 3= | 42x6 | |||||
| 8= | 60x | 2= | 3= | |||||
| 7+ | 70x7 | 18+ | 20x | |||||
| 189x | 21+ | 8= | 5 | |||||
| 3/ | 5= | 8= | 1= | 24x | 9= |
Show solution
| 5 | 4 | 9 | 6 | 2 | 3 | 7 | 1 | 8 |
| 6 | 1 | 8 | 7 | 9 | 4 | 5 | 3 | 2 |
| 2 | 7 | 1 | 9 | 4 | 6 | 8 | 5 | 3 |
| 1 | 2 | 6 | 3 | 5 | 8 | 4 | 9 | 7 |
| 4 | 8 | 5 | 1 | 7 | 9 | 3 | 2 | 6 |
| 8 | 6 | 4 | 2 | 3 | 5 | 9 | 7 | 1 |
| 9 | 5 | 3 | 8 | 1 | 7 | 2 | 6 | 4 |
| 3 | 9 | 7 | 4 | 6 | 2 | 1 | 8 | 5 |
| 7 | 3 | 2 | 5 | 8 | 1 | 6 | 4 | 9 |
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.