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

  customer can buy?

  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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