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What's the product of a certain pair of consecutive odd integers?
(1) Exactly one of the integers is negative.
(2) At least one of the integers is positive.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
Answer:
Statement (1) by itself is sufficient. S1 tells that the mentioned pair is (1, -1). The product of these numbers is ?1?1=?1.
Statement (2) by itself is insufficient. Consider (1,?1) and (1,3).
The correct answer is A
不是很明白，不是不知道有共多少个整数吗，怎么确定乘积呢？难道题目默认个数是确定的？ |
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发表于 2012-10-22 09:31:15
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