东南大学Zhao同学
普林斯顿大学机械工程博士全奖
2015年6月28日GRE数学机经回忆
发布时间：2015年07月17日 来源：毕达留学
毕达留学是一家以“录名校、做口碑”为理念的留学咨询机构，专注本科、硕士和博士等各阶段的海外名校申请。毕达注重个性化和透明化的申请服务，致力于申请者学术和职业素养的提升，帮助申请者从本质上提升竞争力并获名校录取。众多超预期的名校录取，是毕达打造以口碑传播为核心的基础。正因如此，每年都有众多学生以照片和视频形式为毕达留学公开代言。查看更多
据说近期GRE数学难度提高，下面毕达留学为大家整理了2015年6月28日GRE数学机经，供大家参考。
1 If the sum of three positive integers a, b, and c is 11, which TWO of following are sufficient to determine the value of a, b, and c?
None of a, b, and c is 1.
None of a, b, and c is 4.
None of a, b, and c is 7.
None of a, b, and c is 8.
2 In a certain sequence of 90, 105, x, 120, and 125, both the mean and the median are equal to x. What is the value of x?
3 Caitlin’s phone number has ten digits. If Kevin only remember first eight digits, what is the most times that Kevin has to try in order to call Caitlin if he does not dial repetition number.
4 Dr. Mosher call the roll ten days in row. If Candy attended 8 times, Sam attended 7 times, and Amy attended 6 times, and if they show in class simultaneously in only one day, how many days in which exactly two of them attended.
5 In a survey of preference of pets, 40% of the respondents prefer dogs, and 30% of respondents prefer cats. If 40% of the respondents prefer neither dog nor cat, what percent of respondents prefer both dog and cat?
6 What is the greatest prime factor of 79^2 - 50^2
7 The equation x^2 + kx + 1 = 0 has two solution t and r, and t < r. k is a constant.
Quantity A:t
Quantity B:1
8 Three machines, each working at the same constant rate, together can complete a certain job in 9 hours. How many hours needed for one machine to complete the job?
9 Which of following inequalities are individually sufficient to determine 0 < x < 1?
A. x^2 < 1
B. x^2 < x
C. x^2 > x^4
D. x^5 < x^3
10 Ashim purchases some goods whose listed price is $200 in Wal-Mart
Quantity A: Discounted 15%, and then $20 off
Quantity B: $20 off and then discounted 15%
11 For all integers between 100 and 159, what is the ratio of the integers whose tens digit is no more than 3, and units digit is no more than 4?
12 In the figure above, a is parallel with b, and c is parallel with d
Quantity A:X
Quantity B:Y
13 Each of 10 balls has an integer 0 to 9, inclusive, painted on the side. Shane randomly pick one each time without replacement.
Quantity A: The probability that 5 is picked at first time
Quantity B: The probability that 5 is picked at second time
1 If the sum of three positive integers a, b, and c is 11, which TWO of following are sufficient to determine the value of a, b, and c?
None of a, b, and c is 1.
None of a, b, and c is 4.
None of a, b, and c is 7.
None of a, b, and c is 8.
2 In a certain sequence of 90, 105, x, 120, and 125, both the mean and the median are equal to x. What is the value of x?
3 Caitlin’s phone number has ten digits. If Kevin only remember first eight digits, what is the most times that Kevin has to try in order to call Caitlin if he does not dial repetition number.
4 Dr. Mosher call the roll ten days in row. If Candy attended 8 times, Sam attended 7 times, and Amy attended 6 times, and if they show in class simultaneously in only one day, how many days in which exactly two of them attended.
5 In a survey of preference of pets, 40% of the respondents prefer dogs, and 30% of respondents prefer cats. If 40% of the respondents prefer neither dog nor cat, what percent of respondents prefer both dog and cat?
6 What is the greatest prime factor of 79^2 - 50^2
7 The equation x^2 + kx + 1 = 0 has two solution t and r, and t < r. k is a constant.
Quantity A:t
Quantity B:1
8 Three machines, each working at the same constant rate, together can complete a certain job in 9 hours. How many hours needed for one machine to complete the job?
9 Which of following inequalities are individually sufficient to determine 0 < x < 1?
A. x^2 < 1
B. x^2 < x
C. x^2 > x^4
D. x^5 < x^3
10 Ashim purchases some goods whose listed price is $200 in Wal-Mart
Quantity A: Discounted 15%, and then $20 off
Quantity B: $20 off and then discounted 15%
11 For all integers between 100 and 159, what is the ratio of the integers whose tens digit is no more than 3, and units digit is no more than 4?
12 In the figure above, a is parallel with b, and c is parallel with d
Quantity A:X
Quantity B:Y
13 Each of 10 balls has an integer 0 to 9, inclusive, painted on the side. Shane randomly pick one each time without replacement.
Quantity A: The probability that 5 is picked at first time
Quantity B: The probability that 5 is picked at second time
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