Puzzle Detail
Classic Mathdoku Classic 9×9 Easy — Set 31
| 9+4 | 7/ | 7= | 2= | 40x | 15+ | 6= | 3= | |
| 8/ | 9= | 2 | 1- | 1= | 4= | |||
| 2= | 2- | 14+ | 3- | 3=3 | 24x | |||
| 3=3 | 8= | 6 | 2-1 | 7= | 5 | 45x | 16x | |
| 42x | 2= | 13+4 | 8+1 | 7 | ||||
| 1- | 4 | 8= | 5/ | 1 | 2 | 12+ | ||
| 3= | 20x | 13+9 | 3/ | 2-4 | 8= | 4- | ||
| 2-9 | 1= | 4 | 8= | 6 | 13+7 | 2= | ||
| 2-4 | 6-9 | 6= | 1=1 | 3=3 | 8 | 13+ | 7= |
Show solution
| 4 | 5 | 1 | 7 | 2 | 8 | 9 | 6 | 3 |
| 8 | 9 | 7 | 2 | 3 | 5 | 6 | 1 | 4 |
| 1 | 2 | 8 | 5 | 9 | 7 | 3 | 4 | 6 |
| 3 | 8 | 6 | 1 | 7 | 4 | 5 | 9 | 2 |
| 5 | 6 | 2 | 3 | 4 | 9 | 1 | 7 | 8 |
| 6 | 7 | 4 | 8 | 5 | 1 | 2 | 3 | 9 |
| 7 | 3 | 5 | 9 | 6 | 2 | 4 | 8 | 1 |
| 9 | 1 | 3 | 4 | 8 | 6 | 7 | 2 | 5 |
| 2 | 4 | 9 | 6 | 1 | 3 | 8 | 5 | 7 |
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.