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标题: 求解 [打印本页]

作者: zjsnml 时间: 2013-9-20 22:21
标题: 求解

What is the remainder when the sum of thepositive integers x and y is divided by 6?

(1) Whenx is divided by 6, the remainder is 3.

(2) Wheny is divided by 6, the remainder is 1.

A. Statement (1) ALONE issufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE issufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHERare sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE issufficient.

E. Statements (1) and (2) TOGETHERare NOT sufficient.

这题的思路应该怎样？希望大家帮忙解决~~~~

作者: stella9227 时间: 2013-9-20 22:29
X=6a+3 （a为大于等于零的整数）
Y=6b+1 (b为大于等于零的整数）
X+Y=6（a+b）+3+1-------除以六余四。选c

作者: zjsnml 时间: 2013-9-21 09:08
经你那么一算，感觉好简单呢，谢谢啊！！！

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