Puzzle Detail
Classic Mathdoku Classic 6×6 Hard — Set 87
| 10+1 | 4= | 6= | 3= | ||
| 5= | 10+ | 6+ | |||
| 2= | 4= | 12x | |||
| 4= | 18x | 2= | 6= | ||
| 4= | 13+ | ||||
| 18x | 9+ | 12+ |
Show solution
| 1 | 5 | 2 | 4 | 6 | 3 |
| 5 | 2 | 6 | 3 | 4 | 1 |
| 2 | 6 | 4 | 1 | 3 | 5 |
| 4 | 3 | 1 | 2 | 5 | 6 |
| 6 | 4 | 3 | 5 | 1 | 2 |
| 3 | 1 | 5 | 6 | 2 | 4 |
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.