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Diagonal Sums Sudoku
Age 7 to 16
Challenge Level 
| 5 | 1 | 3 | 9 | 6 | 2 | 7 | 8 | 4 |
| 4 | 8 | 6 | 7 | 3 | 5 | 1 | 2 | 9 |
| 7 | 2 | 9 | 8 | 1 | 4 | 6 | 3 | 5 |
| 8 | 6 | 5 | 2 | 7 | 9 | 3 | 4 | 1 |
| 1 | 7 | 4 | 6 | 5 | 3 | 2 | 9 | 8 |
| 3 | 9 | 2 | 1 | 4 | 8 | 5 | 6 | 7 |
| 9 | 5 | 8 | 3 | 2 | 7 | 4 | 1 | 6 |
| 2 | 4 | 1 | 5 | 8 | 6 | 9 | 7 | 3 |
| 6 | 3 | 7 | 4 | 9 | 1 | 8 | 5 | 2 |
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