在GMAT数学备考之前，很多考生都是一头雾水，不知从何下手，如果能在备考前对于GRE数学试背景和答题技巧有个充分的了解，将会对之后的复习和考试起到事半功倍的效果。也可以避免让我们在备考的解题过程中尽量少走弯路，顺畅的通过GMAT数学考试。

GMAT数学考试题目主要是以商业经济或现实生活为背景，以日常会话的形式出现的，从这里我们就可以了解到，它和国内的高考数学还是有一定的区别的，GMAT数学不是特别要求别到题目道题的步骤和就过，主要就是看一个解题的思路。对于应试人要求的内容也是最为基本的算术、代数、平面几何、解析几何和图表等方面基础知识和实用能力。

在答题过程中，GMAT数学一般要求学生在30分钟内至少要完成20道题。对于这样的量来说，考试时间还是比较紧张的，做题的速度是至关紧要的。建议学生在考试时候，要学会对答题时间有很好的把握，遇到难题，也不要轻易的猜测答案，可先在试题旁边做个记号，待完成全部试题后再挤出时间来思考。

这些都是GRE数学考试中最易出错的新GRE数学难题，大家可以看看能不能对你的GRE考试有所帮助：

1.Each employee of a certain company is ineither Department X or Department Y, and there aremore than twice as many employees in Department Xas 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 ofthe following amounts could be the average salaryfor all of the employees in the company?Indicate allsuch amounts.

A $26,000 B$28,000

C $29,000 D$30,000

E $31,000 F$32,000

G $34,000 本题我们要注意到题目中的more than twice的字眼，我们当做twice算的时候，结果是(25000*2+35000)/3约等于28333，因为有more than，所以选的答案要么是比前面这个数大，要么小，又由于more的是X部门的，那么肯定会将平均工资给拉低了，因此，选比前面那个数小的答案，AB都可以了。。 2.Working alone at its constant rate, machine A produces k car parts in 10 minutes.Working alone at its constant rate, machine B produces k car parts in 15 minutes. How manyminutes does it take machines A and B, working simultaneously at their respective constantrates, to produce k car parts? ____________minutes 这类题目小学时候经常遇到，相信很多人都是这种感受哈 1/(1/10+1/15)=6min 1)If the dollar amount of sales at Store P was$800,000 for 2006, what was

the dollar amount of sales at that store for 2008 ?

A $727,200 B$792,000

C $800,000 D$880,000

E $968,000 直接算，800000*(1+10%)*(1-10%)=792000，即B 2)At Store T, the dollar amount of sales for 2007 was what percent of the dollar amount of sales for 2008 ? Give your answer to the nearest 0.1 percent. ___________% 直接算，1/(1-8%)=108.7%(约等于) 3)Which of the following statements must be true? Indicate all such statements. A For 2008 the dollar amount of sales at Store R was greater than that at each of the other four stores. B The dollar amount of sales at Store S for 2008 was 22 percent less than that for 2006. C The dollar amount of sales at Store R for 2008 was more than 17 percent greater than that for 2006. 本题A选项一看到就可以排除了，涉及到两个店的绝对量的比较，这个不确定，没有告诉绝对值。B选项是把两个增长的比例简单地算术相加。肯定错了。所以C肯定是对的了。。算一下也是的确是对的。。 3.A certain store sells two types of pens: one type for$2 per pen and the

other type for $3 per pen. If a customer can spend up to$25 to buy pens at

the store and there is no sales tax, what is the greatest number of pens the

A 9

B 10

C 11

D 12

E 20

这个题首先就可以想到单价越便宜的我就能买的越多，因为它没有说两种笔一定要都买。

4.A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a

number in the list that is 2 standard deviations above the mean, what is the

value of x ?

x=_8+2.5*2=13_这道题不知怎么的，读题的时候度饶了，感觉很费解，什么是两个标准差，以为是个什么特殊的东西，后来问了同学才知道这就是个简单的计算题，没啥特别的，我的个汗啊，考试的时候我碰到了，我肯定错了。。

5.Frequency Distribution for List X

Number 1 2 3 5

Frequency 10 20 18 12

Frequency Distribution for List Y

Number 6 7 8 9

Frequency 24 17 10 9

List X and list Y each contain 60 numbers. Frequency distributions for each list are givenabove. The average (arithmetic mean) of the numbers in list X is 2.7, and the average of thenumbers in list Y is 7.1. List Z contains 120 numbers: the 60 numbers in list X and the 60numbers in list Y.

Quantity A Quantity B

The average of the 120numbers in list Z The median of the 120 numbers in list Z

A中，平均数肯定就是两组的平均数的和的一半，也就是(2.7+7.1)/2=4.9，因为两组的人数相同，而B中median就是(5+6)/2=5.5，所以就是B了。。

6.The figure above shows the graph of the function f in the xy-plane. What is

the value of f ( f (–1)) ? 　　A –2

B –1

C 0

D 1

E 2

这个题就是读图题了，一重重的往外算就好了，f (–1)=2，f(2)=1，即D

7.By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3grams of solution R are mixed with 7 grams of solution S, then liquid A accounts for whatpercent of the weight of the resulting solution?

A 10%

B 13%

C 15%

D 19%

E 26%

这个题小学也经常遇到，(3*8%+7+18%)/(7+3)=15%

8.Of the 700 members of a certain organization, 120 are lawyers. Two members of theorganization will be selected at random. Which of the following is closest to the probabilitythat neither of the members selected will be a lawyer?

A 0.5

B 0.6

C 0.7

D 0.8

E 0.9

这个就是组合的计算了， / =0.68(约等于)，所以选C吧，这个题可以用下那个计算器了。

9.15人中取5人，有3个不能都取，有多少种取法?

C155 –C122

10.7人比赛，A在B的前面的可能性有多少种

P77 / 2 A在B前的次数与在其后的次数相等

11.3对人分为A,B,C三组，考虑组顺和组中的人顺，有多少种分法?

P33 ×(P22 )3 先考虑组顺，再考虑人顺

12.从4个蓝球2个红球中抽两个，第二个是红色的概率：蓝红+红红=(4/6)(2/5)+(2/6)(1/5)=1/3

13.P1，P2，P3，。。。 P1=1.P(n)=24P(n-1)+8.比较P(66)/6 与4 的大小。

解法：P(n)=24P(n-1)+8化为Pn+8/23=24[P(n-1)+8/23]

令An=Pn+8/23，则化为等比数列An=24A(n-1)

14. 5*10^9square feet的shopping area换成正方形，边长是多少miles?已知1mile=5280feet

我们要想要在GRE数学考试中获得好成绩，就要更加努力，这篇GRE数学背景和答题技巧解析希望能给大家带来帮助。

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