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TTGWD11-8

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楼主
发表于 2006-10-25 23:02:00 | 只看该作者

TTGWD11-8

Q8:

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

求思路,这种余数的题总是做不来~~~~~~~~~~~~~

沙发
发表于 2006-10-25 23:26:00 | 只看该作者
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