PS主要考察学生对题目文字的理解能力,然后运用代数,几何,统计等方面的知识来解决一些基础性的问题,并从5个选项中选出一个正确答案。今天我们就来讲一下GMAT数学PS试题OG练习题分析第二部分。
6. A rainstorm increased the amount of water stored in State J reservoirs from 124 billion gallons to 138 billion gallons. If the storm increased the amount of water in the reservoirs to 82 percent of total capacity, approximately how many billion gallons of water were the reservoirs short of total capacity prior to the storm?
(A) 9
(B) 14
(C) 25
(D) 30
(E) 44
翻译:一场暴雨使得水库的蓄水量从124增加到138,占蓄水池总量的82%,那么暴雨之前蓄水池的实际水量相对于总容量来说缺多少。
解析:138占据82%,那么138/82%得出总的蓄水量,减去之前有的124得出的就是缺的水量。
计算公式:138/82%-124=44.3所以答案是E.
7. On the graph above, when x=0.5,y=2, ; and whenx=1,y=1 , . The graph is symmetric with respect to the vertical line atx=2 . According to the graph, when ,x=3,y=?
(A) −1
(B)-0.5
(C) 0
(D)0.5
(E) 1

翻译:如图所示,x=0.5,y=2;x-1,y=1,图形按照x=2对称,那么x=3,y=?
解析:图形关于x=2对称,所以x=3对应的值与x=1对应的值一样,都是1,所以答案是E
8. When 1/10percent of 5,000 is subtracted from 1/10of 5,000, the difference is
(A) 0
(B) 50
(C) 450
(D) 495
(E) 500
翻译:1/10percent of 5,000从减(被剪去)1/10of 5,000,,结果是多少
解析:1/10percent是1/1000.
计算公式:(1/10)*5000-(1/1000)*5000=495,答案选择D
9. Which of the following is the value of

(A) 0.004
(B) 0.008
(C) 0.02
(D) 0.04
(E) 0.2
解析:0.000064来立方结果是.004,0.04开平方是0.2。所以答案是C
10. Raffle tickets numbered consecutively from 101 through 350 are placed in a box. What is the probability that a ticket selected at random will have a number with a hundreds digit of 2?

翻译:一些票标号从101到350,放在一个盒子里。从里边随意选出一张票,上边数字百位数是2的几率有多大?
解析:101到350共可以分成三部分,101到199,200到299,300到350.其中百位数为2的票有299-200+1=100张。总共有350-101+1=250张。所以百位数是2的票的几率是100/250=2/5.答案是A
以上就是关于GMAT数学PS题OG练习题分析的内容介绍,希望考生通过以上内容,不断夯实自己的知识点,熟练做题技巧,提升解题能力以及分析能力,争取都能取得理想成绩。
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