AMC 8 1990 Problem 4

AMC8 1990 年第 4

整除与因数★★☆☆☆
Which of the following could not be the unit's digit [one's digit] of the square of a whole number?
以下哪个数不可能是某个整数的平方的个位数字?

正确答案 · Correct Answer

E

解析 · Solution

解析整理中

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