题目信息
When positive integer x is divided by 5, the remainder is 3; and when x is divided by 7, the remainder is 4. When positive integer y is divided by 5, the remainder is 3; and when y is divided by 7, the remainder is 4. If x>y, which of the following must be a factor of x - y?
A:12
B:15
C:20
D:28
E:35
参考答案及共享解析
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正确答案：
E:35
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