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