1. In a $3 \times 3$ table, arrange the numbers $3,4,5,6,7,8,9,10,11$ so that the product of the numbers in the first column equals the product of the numbers in the first row, the product of the numbers in the second column equals the product of the numbers in the second row, and the product of the numbers in the third column equals the product of the numbers in the third row.
Solution.

| 7 | 3 | 8 |
| :---: | :---: | :---: |
| 6 | 9 | 5 |
| 4 | 10 | 11 |

It is sufficient to provide the required arrangement. The key is to place $7,9,11$ on the diagonal. Corresponding permutations of columns and rows are possible.

Answer. See figure.