Multiple Squares My grandson likes to compile 3x3 magic squares, where each of the three rows of numbers, each of the three columns of numbers and both of the straight diagonals, add up to the same total. This he did without repeating any of the nine numbers in the square. He has now progressed to compiling similar 3x3 squares, which instead of the eight rows, columns and diagonals of numbers adding to the same total, they instead multiply to produce the same product. In his first such square this product was 32,768.

https://www.thetimes.co.uk/article/teaser-3185-9jxd5hj0j

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