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This challenge has been provided by @Joffan
A magic square has rows, columns and diagonals summing to the same number. For a 3x3 magic square there are 8 such sums.
Given a set of 9 distinct integers which has at least 8 subsets of 3 all with a common sum, is it always possible to make a magic square with those integers?
A magic square has rows, columns and diagonals summing to the same number. For a 3x3 magic square there are 8 such sums.
Given a set of 9 distinct integers which has at least 8 subsets of 3 all with a common sum, is it always possible to make a magic square with those integers?