Brain Teasers
Mad Ade's Magic Square #2
Mad Ade placed the numbers 1 through 9 into a 3x3 grid, such that in each of the 8 directions of 3 squares (horizontally, vertically and diagonally) the sum of the first and last numbers minus the center number gives the same result.
Answer
There is only one answer2 1 4
3 5 7
6 9 8
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