Puzzle Detail
Classic Mathdoku Classic 8×8 Easy — Set 20
| 2= | 3= | 4= | 5= | 8= | 7= | 5+ | |
| 6= | 2= | 8= | 6x1 | 7 | 35x | 3= | |
| 4/4 | 21x7 | 8 | 6x3 | 6= | 5= | ||
| 8=8 | 4= | 13+5 | 6=6 | 2= | 1= | 21x | |
| 5= | 8= | 2= | 5- | 1=1 | 10+ | 3 | |
| 3= | 7x1 | 8=8 | 20x | 6= | |||
| 1 | 6= | 5= | 1-3 | 7=7 | 2= | 4/ | |
| 7/ | 5=5 | 6=6 | 1-3 | 8/ |
Show solution
| 2 | 3 | 4 | 6 | 5 | 8 | 7 | 1 |
| 6 | 2 | 8 | 1 | 7 | 5 | 3 | 4 |
| 4 | 1 | 7 | 8 | 2 | 3 | 6 | 5 |
| 8 | 4 | 3 | 5 | 6 | 2 | 1 | 7 |
| 5 | 8 | 2 | 7 | 1 | 6 | 4 | 3 |
| 3 | 7 | 1 | 2 | 8 | 4 | 5 | 6 |
| 1 | 6 | 5 | 4 | 3 | 7 | 2 | 8 |
| 7 | 5 | 6 | 3 | 4 | 1 | 8 | 2 |
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.