Puzzle Detail
Classic Mathdoku Classic 9×9 Medium — Set 4
| 20+ | 11+ | 6= | 2= | 3= | ||||
| 9+ | 3= | 8= | 21+5 | 9x1 | ||||
| 5+ | 20+ | 9+ | 9+ | |||||
| 4 | 1= | 40x | 12+ | 18+9 | ||||
| 2= | 13+ | 5 | 27x | 12+ | 210x | |||
| 3- | 3= | 72x | 7= | 10x | 4= | 1=1 | ||
| 4= | 2= | 3= | 6=6 | |||||
| 8= | 9=9 | 2= | 378x7 | 3 | 14+ | 4= | ||
| 2- | 4= | 9 | 2= | 2- | 7= | 6 | 14+ |
Show solution
| 5 | 8 | 7 | 4 | 1 | 6 | 2 | 3 | 9 |
| 7 | 2 | 3 | 6 | 8 | 9 | 5 | 4 | 1 |
| 1 | 6 | 8 | 5 | 4 | 7 | 9 | 2 | 3 |
| 4 | 7 | 6 | 1 | 5 | 8 | 3 | 9 | 2 |
| 2 | 1 | 5 | 3 | 9 | 4 | 8 | 7 | 6 |
| 6 | 3 | 9 | 8 | 7 | 2 | 4 | 1 | 5 |
| 9 | 4 | 1 | 2 | 3 | 5 | 6 | 8 | 7 |
| 8 | 9 | 2 | 7 | 6 | 3 | 1 | 5 | 4 |
| 3 | 5 | 4 | 9 | 2 | 1 | 7 | 6 | 8 |
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.