A magic square is a grid where every row, column, and diagonal adds to the same number (the "magic sum"). 3ร3 magic square with numbers 1-9: magic sum = 15. Example: | 2 7 6 | | 9 5 1 | | 4 3 8 | โ every row, column, diagonal = 15! Magic squares have fascinated mathematicians for thousands of years. Lo Shu magic square was discovered in China about 2000 BCE.
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