GRE数学考试考前热身试题-智课教育旗下智课教育.pdf

智 课 网 G R E 备 考 资 料 GRE数学考试考前热身试题-智课教育旗下智课教育 本文主要和考生们整理了GRE考试数学中出现的一些高频高质量的 题目，并配有试题解析，希望考生认真备考，祝您考试顺利通过。 本文与考生分享了GRE数学考试中出现的一些高频高质量的题目， 供考生们参考使用，更多GRE考试辅导敬请关注智课教育一对一考试网 。 1.Line k lies in the xy-plane. The x-intercept of line k is –4, and line k passes through the midpoint of the line segment whose endpoints are (2, 9) and (2, 0). What is the slope of line k ？ Give your answer as a fraction.__3/4_____ 2. In the course of an experiment, 95 measurements were recorded, and all of the measurements were integers. The 95 measurements were then grouped into 7 measurement intervals. The graph above shows the frequency distribution of the 95 measurements by measurement interval. Quantity A Quantity B The average (arithmetic The median of the 95 mean) of the 95 measurements Measurements 这个题我觉得可以估计，median应该在6-10这段，而average呢 ，根据图表判断，左边的两段和右边的五段占总人数应该是差不多对半 分，那么平均数就应该是向高处拉了，这个是经验估计。当然也可以通 过算，我觉得这个题去算的话，量相对大些。答案为A 3.The random variable X is normally distributed. The values 650 and 850 are at the 60th and 90th percentiles of the distribution of X, respectively. Quantity A Quantity B The value at the 75th 750 percentile of the distribution of X 这个题，我做的时候是根据图像做的，在正态分布的函数图象上， 60%——90%之间的这段是个下凸的，所以当取750这个自变量的时候 ，对应的函数值应该是比650和850对应函数值的平均值小的，大家画 个图就可以很直观的看出来了。所以750对应的白分比应该是比75%小 ，选项是B 4.If 1+x+x2+x3=60, then the average (arithmetic mean) of x, x2, x3, and x4 is equal to which of the following？ A 12x B 15x C 20x D 30x E 60x 这个题直接在等式的两边乘以x就好了，然后除以4，答案就是B 5. Parallelogram OPQR lies in the xy-plane, as shown in the figure above. The coordinates of point P are (2, 4) and the coordinates of point Q are (8, 6). What are the coordinates of point R ？ A (3, 2) B (3, 3) C (4, 4) D (5, 2) E （6, 2） 这个题直接读图，应该有Q的坐标减去P的坐标等于R的坐标减去O 的坐标，其实也就是两个向量是相等的，O又恰好是原点，那么R的坐 标就是QP的向量坐标了，即(6,2)E选项 6.Let S be the set of all positive integers n such that n2 is a multiple of both 24 an