Puzzle Detail
Classic Mathdoku Classic 9×9 Easy — Set 20
| 9= | 7- | 30x5 | 6= | 4=4 | 6x3 | |||
| 10x | 7= | 12+9 | 11+ | 8= | 1= | |||
| 3= | 8= | 2- | 4 | 2=2 | 9= | 5=5 | 7= | 1= |
| 4 | 5= | 9/ | 9+ | 15+ | ||||
| 4- | 1 | 6+4 | 12+5 | 12+ | 9+ | 6= | ||
| 1=1 | 5-6 | 5=5 | 5- | 2= | 9=9 | 4= | ||
| 2= | 8= | 4= | 5 | 1 | 9= | |||
| 63x | 3= | 3x | 6= | 7 | 10x2 | 4x | 1- | 8= |
| 6=6 | 4= | 7= | 2=2 | 56x8 | 1= | 9=9 | 15x | 5 |
Show solution
| 2 | 9 | 8 | 1 | 5 | 7 | 6 | 4 | 3 |
| 5 | 7 | 9 | 3 | 6 | 4 | 8 | 1 | 2 |
| 3 | 8 | 6 | 4 | 2 | 9 | 5 | 7 | 1 |
| 4 | 5 | 2 | 9 | 1 | 6 | 3 | 8 | 7 |
| 8 | 1 | 4 | 5 | 9 | 3 | 7 | 2 | 6 |
| 1 | 6 | 5 | 7 | 3 | 8 | 2 | 9 | 4 |
| 7 | 2 | 3 | 8 | 4 | 5 | 1 | 6 | 9 |
| 9 | 3 | 1 | 6 | 7 | 2 | 4 | 5 | 8 |
| 6 | 4 | 7 | 2 | 8 | 1 | 9 | 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.