Problem Solving
试题详情
题目：
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?
选项:
A、12
B、15
C、20
D、28
E、35
答案:
E
