Puzzle Detail
Hard Mathdoku Hard 8×8 Mathdoku — Set 1
| 14+ | 11+ | 1=1 | 2=2 | 7= | 1-3 | ||
| 1- | 1120x | 5x | 4 | ||||
| 3= | 4x | 6= | 10+ | 7= | |||
| 336x6 | 1= | 16+ | |||||
| 1= | 280x | 2- | |||||
| 2= | 1= | 9+ | 2/ | 3- | |||
| 18+ | 6= | 24x | |||||
| 9+ | 4- | 9+ | 5= |
Show solution
| 8 | 6 | 5 | 1 | 4 | 2 | 7 | 3 |
| 6 | 3 | 2 | 8 | 7 | 1 | 5 | 4 |
| 3 | 4 | 1 | 6 | 5 | 8 | 2 | 7 |
| 7 | 5 | 6 | 4 | 1 | 3 | 8 | 2 |
| 1 | 8 | 7 | 2 | 3 | 5 | 4 | 6 |
| 2 | 1 | 4 | 5 | 6 | 7 | 3 | 8 |
| 5 | 2 | 3 | 7 | 8 | 4 | 6 | 1 |
| 4 | 7 | 8 | 3 | 2 | 6 | 1 | 5 |
Solver Notes
Hard 8x8 mathdoku puzzles are curated for advanced players and adults, featuring a 8x8 grid with numbers 1–8 and cage targets suited to the hard level.
What makes this hard mathdoku?
The cage designs and arithmetic complexity in hard 8x8 mathdoku are calibrated specifically for advanced players and adults.
How do I print this puzzle?
Click the Print button on any puzzle page to download a clean PDF. Solutions appear on page 2.
Is there a solution?
Yes — every hard 8x8 mathdoku comes with a fully verified solution available online or in the PDF.