Puzzle Detail
Classic Mathdoku Classic 9×9 Easy — Set 81
| 3= | 14x | 8= | 9=9 | 1=1 | 6 | 30x5 | 4= | |
| 4- | 5 | 7= | 4= | 2- | 3= | 2=2 | ||
| 28x | 9= | 2- | 1 | 5= | 36x4 | 2=2 | 8/ | 6= |
| 4 | 6=6 | 1=1 | 7=7 | 2= | 24x | 3 | 5=5 | |
| 6= | 2= | 4=4 | 9= | 3=3 | 5=5 | 1= | 56x | |
| 8= | 1= | 7+ | 12x | 9=9 | 6=6 | 7= | ||
| 10x | 3= | 54x | 35x | 8= | 4 | 9= | 1= | |
| 8= | 1=1 | 2= | 11+7 | 7+3 | ||||
| 4/ | 8= | 2/ | 6= | 12+ | 2= | 9= |
Show solution
| 3 | 7 | 2 | 8 | 9 | 1 | 6 | 5 | 4 |
| 9 | 5 | 7 | 4 | 8 | 6 | 3 | 1 | 2 |
| 7 | 9 | 3 | 1 | 5 | 4 | 2 | 8 | 6 |
| 4 | 6 | 1 | 7 | 2 | 9 | 8 | 3 | 5 |
| 6 | 2 | 4 | 9 | 3 | 5 | 1 | 7 | 8 |
| 8 | 1 | 5 | 2 | 4 | 3 | 9 | 6 | 7 |
| 2 | 3 | 6 | 5 | 7 | 8 | 4 | 9 | 1 |
| 5 | 8 | 9 | 6 | 1 | 2 | 7 | 4 | 3 |
| 1 | 4 | 8 | 3 | 6 | 7 | 5 | 2 | 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.