新GRE考试数学篇

　　2014年新GRE考试早知道连载 之 新GRE考试内容——数学篇

　　数学部分依旧关注代数、几何、统计概率等数学概念，同时引入了更多了生活场景并且更加突出对考生解读数字能力了考察。具体题型主要有多选1；多选多；填答案；比大小。

　　Sample questions：

　　1. The figure above shows a circle with center C and radius 6. What is the sum of the areas of the two shaded regions? 　　7.5π 　　6π 　　4.5π 　　4π 　　3π 　　Answer: D

　　2. The figure above shows the graph of a function f, defined by f(x)=|2x|+4 for all numbers x. For which of the following functions g defined for all numbers x does the graph of g intersect the graph of f ? 　　g(x)=x-2 　　g(x)=x+3 　　g(x)=2x-2 　　g(x)=2x+3 　　g(x)=3x-2 　　Answer: E

　　多选多： 　　1. Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salary is $25,000 for the employees in Department X and is $35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees in the company?

　　Indicate all such amounts。

　　$26,000 　　$28,000 　　$29,000 　　$30,000 　　$31,000 　　$32,000 　　$34,000 　　Answer: A and B

　　2. If f, g, and h are positive integers, f is a factor of g, and g is a factor of h, which of the following statements must be true?

　　Indicate all such statements。

　　f is a factor of g2 　　f is a factor of gh。 　　f is a factor of h-g 　　Answer: A, B, and C 　　填答案 　　1. 　　填答案图1 　　Answer: 101 　　2. A university admitted 100 students who transferred from other institutions. Of these students, 34 transferred from two-year community colleges, 25 transferred from private four-year institutions, and the rest transferred from public four-year institutions. If two different students are to be selected at random from the 100 students, what is the probability that both students selected will be students who transferred from two-year community colleges? 　　Give your answer as a fraction。

　　填答案

　　比大小： 　　A. Quantity A is greater。 　　B. Quantity B is greater。 　　C. The two quantities are equal。 　　D. The relationship cannot be determined from the information given。 　　A symbol that appears more than once in a question has the same meaning throughout the question。

　　1. 　比大小图 　　Answer: A 　　对策： 扎实数学知识，计算时候不要出错。