参加GRE考试的朋友们，留学群GRE考试栏目为大家提供“2017年GRE数学考试机经预测(4.14场次)”，希望能够帮助到各位考生!
题目
1. According to surveys at a company, 20 percent of the employees owned cell phones in 1994, and 60 percent of the employees owned cell phones in 1998. From 1994 to 1998, what was the percent increase in the fraction of employees who owned cell phones?
A. 3%
B. 20%
C. 30%
D. 200%
E. 300%
正确答案
D
题目解析
94年20%的人有手机，98年60%的人有手机，手机人数从20%增长到60%，其中增长的百分比为(60%-20%)/20%，也就是200%，所以选D。
2. The relationship between temperature C, in degrees Celsius, and temperature F, in degrees Fahrenheit, is given by the formula F = 9/5 *c + 32. If a recipe calls for an oven temperature of 210 degrees Celsius, what is the oven temperature in degrees Fahrenheit?
A. 320
B. 350
C. 410
D. 420
E. 500
正确答案
C
题目解析
给出了华氏和摄氏温度的转换公式，将210代入公式的C，得出F=410，选C。
3. In right triangle ABC, the ratio of the lengths of the two legs is 2 to 5. If the area of triangle ABC is 20, what is the length of the hypotenuse?
A. 7
B. 10
C. 4√5
D. √29
E. 2√29
正确答案
E
题目解析
直角三角形已知两直接边比例，根据面积为20，反推出两边分别是4和10，因此斜边长度等于√(16+100)=2√29，选E。
4. If an investment of P dollars is made today and the value of the investment doubles every 7 years, what will be the value of the investment, in dollars, 28 years from today?
A. 8*(P^4)
B. P^4
C. 16*p
D. 8*p
E. 4*p
正确答案
C
题目解析
假设每年利息x，7年后本金翻倍：P*x^7=2P，x=2^(1/7)，28年后就是P*x^28=P*2^4，也就是8*P，所以选C。
5. R is a list of 15 consecutive integers, and T is a list of 21 consecutive integers. The median of the integers in list R is equal to the least integer in list T. If the two lists are combined into one list of 36 integers, how many different integers are on the combined list?
A. 25
B. 27
C. 28
D. 32
E. 36
正确答案
C
题目解析
两个连续的整数数列R和T，其中R的中位数等于T的最小数，求两个数列合并后会有多少个不重复的整数。因为R的中卫数等于T的最小数，且R一共有15个数字，因此从R的第八个整数开始往后的一共8个整数将和T中的前8个整数重复，所以两者合并后不重复整数数量应该是15+21-8=28个，所以选C。