Puzzle Detail
Classic Mathdoku Classic 9×9 Easy — Set 21
| 5x1 | 9 | 2= | 4= | 2/6 | 8= | 5=5 | 3-7 | |
| 5 | 11+ | 24x | 9= | 1= | 7=7 | 6= | 4 | |
| 1-8 | 6= | 1= | 2= | 5 | 4=4 | 21x | 7 | 9 |
| 9 | 8= | 7= | 5=5 | 9+4 | 3= | 12x | 9/ | |
| 14x | 1= | 5= | 3= | 6= | 8= | 13+ | 2= | |
| 11+ | 4= | 6= | 72x | 1= | 2- | |||
| 3 | 4 | 9+ | 7=7 | 10x2 | 5 | 3- | ||
| 18x | 3= | 9= | 7=7 | 2= | 20x | 1= | 8 | |
| 4= | 5= | 6= | 9= | 1=1 | 7= | 16x | 24x |
Show solution
| 1 | 9 | 2 | 4 | 3 | 6 | 8 | 5 | 7 |
| 5 | 2 | 3 | 8 | 9 | 1 | 7 | 6 | 4 |
| 8 | 6 | 1 | 2 | 5 | 4 | 3 | 7 | 9 |
| 9 | 8 | 7 | 5 | 4 | 3 | 6 | 2 | 1 |
| 7 | 1 | 5 | 3 | 6 | 8 | 9 | 4 | 2 |
| 2 | 7 | 4 | 6 | 8 | 9 | 1 | 3 | 5 |
| 3 | 4 | 8 | 1 | 7 | 2 | 5 | 9 | 6 |
| 6 | 3 | 9 | 7 | 2 | 5 | 4 | 1 | 8 |
| 4 | 5 | 6 | 9 | 1 | 7 | 2 | 8 | 3 |
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.