2014-05-03 12:00:00 来源: 互联网 责编:楷维留学指南
GMAT考试作为申请美国研究生的学术考试,其重要性不言而喻。不过在市场上并没有GMAT考试真题出售,原因在于GMAT考试都是使用题库出题,GMAT官方每隔一段时间都会更换题库,以保证考题的新鲜度。因此GMAT考生回忆的机经就受到考生的热捧。
今天楷维留学小编就给各位整理GMAT考试官网上的一道数学真题:Data Sufficiency,是GMAT数据充分性真题,真题来之不易,赶紧试试自己的实力吧!
Prepare for the GMAT Exam-Test Prep Materials-GMAT 真题训练:Data Sufficiency
题目
What is the average (arithmetic mean) of a, b, and c ?
(1)a + 2b + 3c = 10
(2)3a + 2b + c = 14
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:C
解题思路:
The average of a, b, and c is a+b+c/3. Statement (1) says that a+2b+3c = 10, but there is not enough information to determine the value of a+b+c. Thus, statement (1) alone is not sufficient. Similarly, the equation statement (2) also fails to give enough information, so statement (2) alone is not sufficient. If the equations in statements (1) and (2) are added together, term by term, the result is 4a+4b+4c=24, which means that a+b+c = 6. The average is therefore 6/3 = 2. Thus, BOTH statements TOGETHER are sufficient to answer the question. The best answer is C.
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