A magic square is a 3 by 3 matrix filled with integers in the range [1 - 9] so that each entry in the matrix has a unique value. The sum of each of the rows and each of the columns and each of the two diagonals must be equal to 15.

Answer 1

The magic square
2 9 4
7 5 3
6 1 8

Answer 2

it's true

Answer 3

I dont think, just a constatation...