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Difficulty: 3 of 5 Latest: Looking for a square result
For each positive integer n, let Mn be the square matrix (nxn) where each diagonal entry is 2018, and every other entry is 1.

Determine the smallest positive integer n (if any) for which the value
of det(Mn) is a perfect square.

(No Solution Yet, 18 Comments) Submitted on 2018-06-14 by Ady TZIDON   
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