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