留学网【专业的出国留学网站】-悦想语者

目录

GRE数学机经试题练习一

|

2017-03-10 14:39:00

|
ID:1

  “GRE数学机经试题练习一”由出国留学网GRE考试栏目为您提供,童鞋们,GRE考试的日子正在一步步逼近,赶快抓紧时间复习吧,希望本文能够帮助到大家!

  题目:

  1. In a probability experiment, G and H are independent events. The probability that G will occur is r, and the probability that H will occur is s, where both r and s are greater than 0.

  Quantity A:the probability that either G will occur or H will occur, but not both

  Quantity B:r+s-r*s

  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.

  正确答案:B

  题目解析:G事件与H事件互相独立,G事件概率为r, H事件概率为s,求两事件其中之一发生的概率。

  只发生G事件:r*(1-s)

  只发生H事件:s*(1-r)

  相加可得 r+s-2*r*s,小于Quantity B,因此选B。

  2. The area of circle W is 16*π and the area of circle Z is 4*π. What is the ratio of the circumference of W to the circumference of Z?

  A. 2 to 1

  B. 4 to 1

  C. 8 to 1

  D. 16 to 1

  E. 32 to 1

  正确答案:A

  题目解析:根据圆形面积公式,可知两圆的半径比例为2:1,然后根据周长公式计算,其州长比例也为2:1。所以选A。

  3. The interior dimensions of a rectangular tank are as follows: length 110 centimeters, width 90 centimeters, and height 270 centimeters. The tank rests on level ground. Based on the assumption that the volume of water increases by 10 percent when it freezes, which of the following is closest to the maximum height, in centimeters, to which the tank can be filled with water so that when the water freezes, the ice would not rise above the top of the tank?

  A. 230

  B. 235

  C. 240

  D. 245

  E. 250

  正确答案:D

  题目解析:已知水箱长宽高数据,和水结冰时会上升10%高度的推论,问水箱里可以装多少水,其结冰时也不会超过水箱高度。设为x,列出1.1x=270,x约等于245,所以选D。

  4. In a certain sequence of numbers, each term after the first term is found by multiplying the preceding term by 2 and then subtracting 3 from the product. If the 4th term in the sequence is 19, which of the following numbers are in the sequence? Indicate all such numbers.

  A. 5

  B. 8

  C. 11

  D. 16

  E. 35

  正确答案:A C E

  题目解析:第一项设为x,根据题目条件可知第二项2x-3,第三项2(2x-3)-3=4x-9,第四项依次类推为8x-21。接下来根据第四项=40算出x=5,代入前五项,分别算出5,7,11,40,35。其中符合条件的选项为ACE。

  5.


  The quadrants of the xy-plane are shown in the figure above. In the xy-plane, line m (not shown) has a positive slope and a positive x-intercept. Line m intersects which of the quadrants? Indicate all such quadrants

  A. Quadrant I

  B. Quadrant II

  C. Quadrant III

  D. Quadrant IV

  正确答案:A C D

  题目解析:本题关键在于看懂抽象描述。问直线m经过哪几个象限。条件positive slope可知m大致上是从左下往右上的斜线,那么第二和第四象限必然有一个不经过或者两个都不经过,条件positive x-intercept表明m和x轴的正数侧也就是右侧相交,那么m经过象限就是1,3,4,所以选ACD。

想了解更多留学网(www.iliuxue360.cn)的资讯,请访问:   GRE考试  |  GRE作文  |  GRE词汇  |  GRE阅读  |  GRE报名  |  GRE数学  |

本文来源:http://www.iliuxue360.cn/showinfo-154-90303-0.html
延伸阅读
  大家做好准备迎接GRE考试了吗?出国留学网诚意整理“2017年8月25日GRE数学预测习题”,只要付出了辛勤的劳动,总会有丰硕的收获!欢迎广大考生前来学习。  2017年8月25日GR
2017-08-16 11:25:00
ID:3
  出国留学网小编为大家带来2017GRE数学考试专项练习题集(一),欢迎参考!更多相关内容请继续关注本网站!  2017GRE数学考试专项练习题集(一)   答案:E  出国留学网G
2017-07-20 17:39:00
  要参加GRE考试的同学们,出国留学网为你整理“2017年GRE数学模拟练习题二”,供大家参考学习,希望广大放松心态,从容应对,正常发挥。更多资讯请关注我们网站的更新哦!  2017
2017-08-12 17:12:00
ID:4
  参加GRE考试的朋友们,出国留学网GRE考试栏目为大家提供“往年GRE数学试题解析”,小伙伴们赶快抓紧时间复习吧!
  1.正整数x,下面哪个选项不和3x相等
  我选
2017-04-18 16:59:00
  要参加GRE考试的同学们,出国留学网为你整理“2017年GRE数学模拟练习题一”,供大家参考学习,希望广大放松心态,从容应对,正常发挥。更多资讯请关注我们网站的更新哦!  2017
2017-08-12 17:11:00

快速定制留学方案

ID:8