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Magic Squares

Magic squares are a part of mathematics very entertaining, as well as learn from them a trick to impress others, to while, you learn things about math. These squares must follow a rule: all the numbers of each diagonal and each row must sum to the same numerical quantity. In addition, there are several squares of different sizes and numerical quantities: some all numbers in a diagonal or a column added, for example, nine, and in others the amount will be different. In this square each diagonal row or each added fifteen:

For me it was one of the most enjoyable parts of the book, I found out that mathematics is used for many things.

Signed: Serafin Sanchez Carmona