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MathNet 2019-part-04 — 184 problems (EN–VI) Question 32

Math Olympiad Vault · MathNet 2019-part-04 — 184 problems (EN–VI)

Question 32

From the set $\{1,2,3, \ldots, n\}$ we choose 9 pairwise distinct numbers and write them in the cells of a $3 \times 3$ table so that the products of the numbers in each row, each column and both diagonals are equal. Determine the smallest value of $n$ for which such a table exists.