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请把1至9这九个数字,分别填入下图的空白方格内,使每一个圆内的四个数字之和都为24,现在“8”“1”已填,其余的数应该怎样填呢?
Please fill in the nine numbers from 1 to 9 in the blank boxes below, so that the sum of the four numbers in each circle is 24. Now that “8 ” “1 ” has been filled in, How to fill the remaining number?