Question
Use digits $1$ to $9$ only. Use each digit once in such a way that each row, each column makes a sum of $15.$
| $8$ | ||
| $5$ | ||
| $2$ |
| $8$ | ||
| $5$ | ||
| $2$ |
| $8$ | 2 | 5 |
| 2 | $5$ | 8 |
| 5 | 8 | $2$ |
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| $9$ | ||
| $7$ | ||
| $5$ |
| $5$ | ||
| $4$ | ||
| $3$ |
| $9$ | ||
| $6$ | ||
| $3$ |