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