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