Math Insight

Every row, column, and box in a completed Sudoku sums to 45 — the sum of digits 1 through 9. A useful sanity check.

Math Insight
✓ Completed! 👍
7
6
1
2
3
4
6
2
9
4
7
8
6
8
6
5
2
2
8
9
6
5
9
1
9
4
Challenge Yourself

Solve a Hard puzzle and narrate each move aloud — explaining why forces you to understand, not just execute.

Challenge Yourself