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