Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 3
| 1= | 19+ | 3- | 112x | 18+ | ||||
| 17+ | 6x | |||||||
| 16x | 7 | 1= | 17+ | |||||
| 112x7 | 16+ | 2/ | 144x | 2= | ||||
| 144x | 9 | 8= | 168x | |||||
| 6= | 90x | 15x | 9= | |||||
| 2= | 7= | 9= | 6= | 6+ | 8= | |||
| 2= | 42x | 4= | 54x | 105x | ||||
| 192x | 7 | 13+ | 168x | 5= |
Show solution
| 1 | 9 | 2 | 3 | 7 | 8 | 4 | 5 | 6 |
| 9 | 5 | 7 | 8 | 4 | 2 | 6 | 3 | 1 |
| 5 | 3 | 4 | 2 | 6 | 7 | 1 | 8 | 9 |
| 7 | 4 | 5 | 1 | 3 | 9 | 8 | 6 | 2 |
| 4 | 6 | 3 | 9 | 8 | 5 | 2 | 1 | 7 |
| 6 | 1 | 8 | 5 | 2 | 3 | 7 | 9 | 4 |
| 2 | 7 | 9 | 6 | 5 | 1 | 3 | 4 | 8 |
| 8 | 2 | 1 | 4 | 9 | 6 | 5 | 7 | 3 |
| 3 | 8 | 6 | 7 | 1 | 4 | 9 | 2 | 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.