Four Squares with One Number in the Middle: Find It (中文)
Four squares surround a central empty circle. The numbers in the squares follow a rule that determines the center value.

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Four squares surround a central empty circle. The numbers in the squares follow a rule that determines the center value.

暂无解答,赶快成为第一个贡献者!
有不同的解题思路?分享您的解析。