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提到幻方,想必大家不会陌生.相传在大禹治水的年代里,陕西的洛水中有一只神龟,背上有一幅奇特的图文,人们称之为“洛书”.这幅图用今天的数学符号表示出来,就是在3×3的方格里,既不重复又不遗漏地填上了1～9这九个连续的自然数,每数占一格,并且每行、每列及两条对角线上3个自然数的和都相等,这样排成的数称为三阶幻方,这个相等的和叫幻和.幻方虽小,魅力无穷,因为在其中蕴藏着许多
Mentioned that the magic square, presumably we will not be unfamiliar. According to legend, in the era of flood control in the flood, there is a turtle in Shaanxi Luoshui, a strange graphic on the back, people call it “Luo book”. The map is represented by today’s mathematical symbols. In the 3×3 grid, nine continuous natural numbers of 1 to 9 are filled in without repetition, and each number is one, and each row, The sum of the three natural numbers on each column and two diagonal lines is equal, so the number of rows arranged is called the third-order magic square. This equal sum is called magic sum. The magic square is small and attractive because it contains a lot of