Puzzle Detail
Classic Mathdoku Classic 9×9 Hard — Set 65
| 19+ | 6x | 5= | 30+ | 19+ | ||||
| 3= | 2= | |||||||
| 9= | 20x | 25+ | 7= | 2= | ||||
| 7= | 2/ | 8= | 5= | 9+ | ||||
| 15+ | 27x | 21x7 | 3- | 8= | ||||
| 192x | 5= | |||||||
| 4-5 | 2= | 7= | 15+ | 3= | 54x | 6= | ||
| 5 | 6+ | 7= | 54x9 | 4- | 3= | 2= | ||
| 2= | 22+ | 6= | 1= | 4- |
Show solution
| 1 | 4 | 6 | 2 | 3 | 5 | 9 | 8 | 7 |
| 3 | 8 | 1 | 4 | 2 | 9 | 6 | 7 | 5 |
| 9 | 3 | 5 | 1 | 6 | 8 | 7 | 2 | 4 |
| 7 | 6 | 8 | 9 | 5 | 2 | 4 | 1 | 3 |
| 6 | 2 | 9 | 3 | 1 | 7 | 5 | 4 | 8 |
| 8 | 9 | 4 | 5 | 7 | 3 | 2 | 6 | 1 |
| 4 | 5 | 2 | 7 | 8 | 1 | 3 | 9 | 6 |
| 5 | 1 | 7 | 6 | 9 | 4 | 8 | 3 | 2 |
| 2 | 7 | 3 | 8 | 4 | 6 | 1 | 5 | 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.