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