51. Magic Squares_Basics | |||
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A large square is sub-divided into equal number of rows and columns. Numbers are filled into the resulting array of smaller boxes in such a way that, usually, the total of numbers in any row or in any column or in any diagonal is the same.

These are known as

Magic squares have 3 by 3, 4 by 4, 5 by 5,

These have 3

So magic squares may have 9, 16, 25, 36, 49, ..., smaller boxes and

these will need that many numbers to fill.

Note that

While he was in school, young