【GMAT考满分数学PS题库】A set of numbers has the property that for any _真题_答案_解析 GMAT考满分官网

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题目内容

A set of numbers has the property that for any number $y$ in the set, $-3y$ is also in the set. If $-2$ is in the set, which of the following must also be in the set?

I. $\frac{2}{3}$

II. $6$

III. $18$

AI only
BII only
CI and II only
DII and III only
EI, II, and III

显示答案

正确答案: B

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