9×9 Sudoku for 9–10-Year-Olds — Medium
Fewer numbers, fewer shortcuts: this medium 9×9 sudoku for 9–10-year-olds gives 34 of the 81 numbers and asks children to scan boxes rather than wait for obvious gaps.
1 A4 page · for home and classroom use
Sudoku 9×9 — medium
How to use this worksheet
- At the start, only one empty square has a single possible number: row 9, column 8, which must be 6. Finding it is the first challenge.
- After that, scan boxes: pick a number, say 7, and ask where in a given 3×3 box it can go.
- The bottom-middle box shows only one number, 8, so leave it for last.
- Check each finished area against the solution page.
What this worksheet teaches
A 9×9 sudoku has nine rows, nine columns and nine 3×3 boxes, and each must contain 1 to 9 once. With 34 numbers given, 47 squares are empty, and the grid has exactly one solution. Unlike the easy level, this one rarely offers a row that is almost full, so children must switch between looking at squares and looking at numbers.
Scanning a box for one number
Choose a box and a number that is not in it yet. Look along the three rows and three columns that cross the box: every row or column that already contains the number blocks its squares. If only one square in the box stays unblocked, the number goes there. This is the main technique for medium sudoku.