Math Insight

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

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

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

Math Insight