Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 42
| 180x | 12+ | 9= | 3/ | 2= | 18+ | |||
| 9 | 19+ | 18x | ||||||
| 108x | 5= | 2= | 32x | 7=7 | ||||
| 21x | 6+ | 8= | 24x | 4- | ||||
| 16x | 7= | 40x | 9= | 3= | 30x | |||
| 14+ | 126x | 5 | 26+ | 11+ | ||||
| 3= | 4 | 8= | ||||||
| 6= | 2= | 18+ | ||||||
| 7+ | 26+ | 13+ | 12+ | 6= |
Show solution
| 5 | 4 | 6 | 9 | 7 | 1 | 3 | 2 | 8 |
| 9 | 2 | 5 | 4 | 8 | 6 | 1 | 7 | 3 |
| 6 | 9 | 1 | 5 | 2 | 3 | 8 | 4 | 7 |
| 7 | 3 | 2 | 8 | 6 | 4 | 9 | 1 | 5 |
| 2 | 8 | 4 | 7 | 1 | 9 | 5 | 3 | 6 |
| 8 | 1 | 7 | 3 | 5 | 2 | 4 | 6 | 9 |
| 1 | 5 | 3 | 6 | 4 | 8 | 7 | 9 | 2 |
| 3 | 6 | 8 | 1 | 9 | 7 | 2 | 5 | 4 |
| 4 | 7 | 9 | 2 | 3 | 5 | 6 | 8 | 1 |
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.