Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 77
| 5= | 7+ | 16+ | 6x | 7x | ||||
| 2/4 | 5+ | 126x | 6=6 | 30+ | ||||
| 4= | 8= | 5 | 2- | |||||
| 14x | 8= | 5x | 16+ | 1= | 2- | |||
| 13+ | 112x | |||||||
| 9= | 6= | 20+ | 8 | |||||
| 3= | 1= | 135x | 21+ | 4= | 14+ | 14+ | ||
| 30+ | 1= | 192x | 7= | |||||
| 1= | 40x | 2= | 3= | 8+ |
Show solution
| 8 | 5 | 4 | 3 | 2 | 9 | 6 | 7 | 1 |
| 4 | 3 | 2 | 9 | 5 | 6 | 1 | 8 | 7 |
| 1 | 4 | 7 | 2 | 8 | 5 | 3 | 6 | 9 |
| 7 | 2 | 8 | 5 | 4 | 3 | 9 | 1 | 6 |
| 5 | 6 | 3 | 1 | 9 | 7 | 8 | 2 | 4 |
| 2 | 9 | 5 | 6 | 3 | 1 | 7 | 4 | 8 |
| 3 | 1 | 9 | 7 | 6 | 8 | 4 | 5 | 2 |
| 6 | 8 | 1 | 4 | 7 | 2 | 5 | 9 | 3 |
| 9 | 7 | 6 | 8 | 1 | 4 | 2 | 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.