| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-851ykk |
A grocer has 400 pounds of coffee in stock, 20 percent of which is decaffeinated. If the grocer buys another 100 pounds of coffee of which 60 percent is decaffeinated, what percent, by weight, of t... |
95% |
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DS-e21tkk |
If 2 different representatives are to be selected at random from a group of 10 employees and if p is the probability that both representatives selected will be women, is [math]p ＞ 1/2[/math]?[br/]... |
53% |
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PS-861ylk |
If the population of a certain country is 120,256,000 and its land area is 2,998,000 square kilometers, then the population per square kilometer is closest to which of the following? |
89% |
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PS-761ymk |
[math](4.8(10^9))/(1.6(10^3))=[/math] |
87% |
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DS-ad1tlk |
If [math]vmt ≠ 0[/math], is [math]v^2m^3t^4 ＞ 0[/math]?[br/](1)[math]m ＞ v^2[/math][br/](2)[math]m ＞ t^4[/math] |
92% |
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DS-d11tmk |
[img]0106.jpg[/img][br/]In the figure shown, line segment AD is parallel to line segment BC. What is the value of x?[br/](1)y=50[br/](2)z=40 |
89% |
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PS-aa1ynk |
A certain university will select 1 of 7 candidates eligible to fill a position in the mathematics department and 2 of 10 candidates eligible to fill 2 identical positions in the computer science de... |
87% |
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PS-791yok |
The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is [math]4/3[/math]π, what is the length of line segment RU? |
82% |
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DS-0a1tnk |
For all integers n, the function f is defined by [math]f (n) = a^n[/math], where a is a constant. What is the value of f (1)?[br/](1)f (2) = 100[br/](2)f (3) = -1,000 |
73% |
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DS-ef1tok |
What is the value of [math](x - y)^4[/math]?[br/](1)The product of x and y is 7.[br/](2)x and y are integers. |
70% |
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DS-dc1tpk |
Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary’s campaign. If no one donated more than o... |
74% |
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PS-671ypk |
When n liters of fuel was added to a tank that was already [math]1/3[/math] full, the tank was filled to [math]7/9[/math] of its capacity. In terms of n, what is the capacity of the tank, in liters? |
92% |
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PS-cd1yqk |
If n is a positive integer, what is the remainder when [math]3^(8n+ 3) + 2[/math] is divided by 5? |
74% |
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PS-b61yrk |
Of all the students in a certain dormitory, [math]1/2[/math] are first-year students and the rest are second-year students. If [math]4/5[/math] of the first-year students have not declared a major ... |
80% |
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PS-a91ysk |
If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which [math]3^k[/math] is a factor of p? |
74% |
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DS-031tqk |
If x and y are positive, is [math]x^3 ＞ y[/math]?[br/](1)[math]sqrt x ＞ y[/math][br/](2)x ＞ y |
69% |
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PS-a82kik |
If x, y, and k are positive numbers such that [math](x/(x+y))(10)+(y/(x+y))(20)[/math]=k and if x＜y which of the following could be the value of k? |
68% |
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DS-b21trk |
What is the value of the integer k?[br/](1)k + 3 ＞ 0[br/](2)[math]k^4 <=0[/math] |
84% |
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PS-3b1zyk |
Each of the 30 boxes in a certain shipment with either 10 pounds or 20 pounds, and the average (arithmetic mean) weight of the boxes in the shipment is 18 pounds. If the average weight of the boxes... |
66% |
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DS-651tsk |
Tom, Jane, and Sue each purchased a new house. The average (arithmetic mean) price of the three houses was $120,000. What was the median price of the three houses?[br/](1)The price of Tom's house w... |
71% |
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DS-211ttk |
The results of a certain experiment included 6 data values that were all multiples of the same number c, namely, c, 8c, 2c, 5c, 4c, and 4c. Was the average (arithmetic mean) of the 6 data values gr... |
89% |
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DS-ac1tuk |
[img]0122.jpg[/img][br/]What is the value of x + y in the figure above?[br/](1)W=95[br/](2)Z=125 |
87% |
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PS-fb1yvk |
The age of the Earth is approximately [math]1.3*10^17[/math] seconds, and one year is approximately [math]3.2*10^7[/math] seconds. Which of the following is closest to the age of the Earth in years? |
91% |
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PS-301ywk |
Four staff members at a certain company worked on a project. The amounts of time that the four staff members worked on the project were in the ratio 2 to 3 to 5 to 6. If one of the four staff membe... |
89% |
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PS-211yxk |
If the sequence [math]x_1[/math], [math]x_2[/math], [math]x_3[/math], …, [math]x_n[/math], … is such that [math]x_1 = 3[/math] and [math]x_(n+1) = 2x_n - 1[/math] for n ≥ 1, then [math]x_20 - x_19[... |
79% |
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DS-521tvk |
If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?[br/](1)The tens digit of k + 9 is 3.[br/](2)The tens digit of k + 4 is 2. |
66% |
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PS-9a1yyk |
2 + 2*3 + 3*4 = |
96% |
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PS-f41yzk |
Three printing presses, R, S, and T, working together at their respective constant rates, can do a certain printing job in 4 hours. S and T, working together at their respective constant rates, can... |
94% |
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PS-28234k |
If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be |
86% |
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DS-ba1x6k |
The total cost of an office dinner was shared equally by k of the n employees who attended the dinner. What was the total cost of the dinner?[br/](1)Each of the k employees who shared the cost of t... |
88% |
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PS-e21z1k |
Three of the four vertices of a rectangle in the xy-coordinate plane are (-3, 10), (2, 10), and (2, 1). What is the fourth vertex? |
96% |
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DS-351txk |
[img]0132.jpg[/img][br/]Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. W... |
64% |
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PS-061z2k |
At a certain school, the ratio of the number of second graders to the number of fourth graders is 8 to 5, and the ratio of the number of first graders to the number of second graders is 3 to 4. If ... |
85% |
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DS-a21tyk |
In the xy-plane, what is the slope of line l?[br/](1)Line l dose not intersect the line with equation y = 1 - x.[br/](2)Line l intersects the line with equation y = x - 1. |
81% |
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DS-e51xxk |
Guy's net income equals his gross income minus his deductions. By what percent did Guy's net income change on January 1, 1989, when both his gross income and his deductions increased?[br/](1)Guy’s ... |
81% |
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PS-761z3k |
[img]0136.jpg[/img][br/]On the number line, the shaded interval is the graph of which of the following inequalities? |
93% |
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PS-7a1z4k |
Of the 500 business people surveyed, 78 percent said that they use their laptop computers at home, 65 percent said that they use them in hotels, and 52 percent said that they use them both at home ... |
92% |
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GWD模考测试题14
