2. 外语
  3. If b is an integer, is an integer? (1) a2 + b2 is an integer. (2) a2-3b2 = 0

If b is an integer, is an integer? (1) a2 + b2 is an integer. (2) a2-3b2 = 0

admin2022-10-18  53
问题 If b is an integer, is an integer?
(1) a2 + b2 is an integer.
(2) a2-3b2 = 0
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B
解析 Given that b is an integer, determine if is an integer.
(1)     It is given that a2 + b2 is an integer. If a = 3 and b = 4, then = 5, which is an integer. However, if a=l and b = 2, then , which is not an integer; NOT sufficient.
(2)     It is given that a2 - 3b 2 = 0, from which it follows that a 2 = 3b2.Then, , which is an integer; SUFFICIENT.
The correct answer is B;
statement 2 alone is sufficient.
转载请注明原文地址:https://kaotiyun.com/show/qttO777K
本试题收录于： GMAT QUANTITATIVE题库GMAT分类
0

GMAT QUANTITATIVE

GMAT

相关试题推荐
随机试题
最新回复(0)