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! 👍
5
3
9
9
7
2
3
1
9
6
8
1
7
8
3
5
9
1
5
9
2
4
3
6
2
9
Challenge Yourself

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

Challenge Yourself