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外语
Is x an integer? (1) x2 is an integer. (2) x/2 is not an integer.
Is x an integer? (1) x2 is an integer. (2) x/2 is not an integer.
admin
2022-10-18
53
问题
Is x an integer?
(1) x
2
is an integer.
(2) x/2 is not an integer.
选项
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案
E
解析
Determine if x is an integer.
(1) It is given that x
2
is an integer. If, for example, x
2
= 49, then x is an integer. However, if x
2
= 5, then x is not an integer; NOT sufficient.
(2) It is given that x/2 is not an integer. If, for example, x = 7, then x/2 is not an integer, but
x is an integer. However, if x =
, then x/2 is not an integer and neither is x; NOT sufficient.
Taken together, (1) and (2) are not sufficient because the same examples used to show that (1) is not sufficient also show that (2) is not sufficient.
The correct answer is E;
both statements together are still not sufficient.
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本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
0
GMAT QUANTITATIVE
GMAT
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