| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-2e2ryk |
At a certain company, the average (arithmetic mean) salary of 10 of the employees is $30,000, the average salary of 30 other employees is $40,000, and the average salary of the remaining 20 employe... |
97% |
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DS-5a2rzk |
The ratio of the number of women to the number of men to the number of children in a room is 5:2:7, respectively. What is the total number of people in the room?[br/](1) The total number of women a... |
63% |
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PS-472s0k |
A coin that is tossed will land heads or tails, and each outcome has equal probability. What is the probability that the coin will land heads at least once on two tosses? |
82% |
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DS-ed1u3k |
On a certain date, Hannah invested $5,000 at x percent simple annual interest and a different amount at y percent simple annual interest. What amount did Hannah invest at y percent simple annual in... |
82% |
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DS-2a2s1k |
[img]20120326021046767_3601.jpg[/img][br/]Is quadrilateral ABCD a square?[br/](1) AB = BC = CD = DA[br/](2) x + y = 180 |
73% |
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PS-7321ak |
[img]0608.jpg[/img][br/]The figure above represents a square garden that is divided into 9 rectangular regions with indicated dimensions in meters. The shaded regions are planted with peas, and the... |
81% |
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DS-5a1u7k |
If y is an integer and [math]y =|x| + x[/math], is y = 0?[br/](1)x ＜ 0[br/](2)y＜ 1 |
37% |
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PS-2720jk |
In the sequence 1, 2, 4, 8, 16, 32, …, each term after the first is twice the previous term. What is the sum of the 16th, 17th, and 18th terms in the sequence? |
85% |
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DS-682s2k |
How many years did Dr. Jones live?[br/](1) If Dr. Jones had become a doctor 10 years earlier than he did, he would have been a doctor for exactly [math]2/3[/math] of his life.[br/](2) If Dr. Jones ... |
86% |
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DS-561u1k |
What is the hundreds digit of the integer z?[br/](1)10z = 93,120[br/](2)z rounded to the nearest hundred is 9,300. |
92% |
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DS-452rxk |
How many different factors does the integer n have?[br/](1) [math]n=a^4b^3[/math], where a and b are different positive prime numbers.[br/](2) The only positive prime numbers that are factors of n ... |
67% |
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PS-632s3k |
If f is the function defined by [math]f(x)=x^2(1-x)^2[/math] for all x, then f(1-x) = |
92% |
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DS-c71u9k |
If x is negative, is x ＜ -3?[br/](1)[math]x^2 ＞ 9[/math][br/](2)[math]x^3 ＜ -9[/math] |
58% |
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PS-022s4k |
A three-digit code for certain logs uses the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 according to the following constraints. The first digit cannot be 0 or 1, the second digit must be 0 or 1, and the s... |
70% |
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DS-e02s5k |
If the average (arithmetic mean) of 5 different numbers is 12, what is the median of the 5 numbers?[br/](1) The median of the 5 numbers is equal to [math]1/3[/math] of the sum of the 4 numbers othe... |
81% |
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PS-191zgk |
If n is an integer greater than 6, which of the following must be divisible by 3? |
80% |
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PS-f52s6k |
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of body weight, by what percent ... |
85% |
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PS-2a2s7k |
If [math]9x=27^y[/math], which of the following expresses x in terms of y? |
92% |
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DS-f01u5k |
What is the value of xy?[br/](1)[math]2^(x+y)[/math]=4[br/](2)[math]2^(x+3y)[/math]=16 |
96% |
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DS-892s8k |
Was Lisa's annual salary at least twice as much as Julie's annual salary?[br/](1) Lisa's annual salary was $20,000 more than Julie's annual salary.[br/](2) Lisa's annual salary was less than $40,000.
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73% |
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PS-702s9k |
An object thrown directly upward is at a height of h feet after t seconds, where [math]h=-16(t-3)^2+150[/math]. At what height, in feet, is the object 2 seconds after it reaches its maximum height? |
77% |
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PS-961zhk |
At a monthly meeting, [math]2/5[/math] of the attendees were males and [math]7/8[/math] of the male attendees arrived on time. If [math]9/10[/math] of the female attendees arrived on time, what fra... |
94% |
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DS-142sak |
If [math]x^2–y=w[/math], what is the value of x?[br/](1) w + y = 4[br/](2) y = 1 |
84% |
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PS-7224lk |
If w, x, y, and z are integers such that 1 ＜ w ＜ x ＜ y ＜ z and wxyz = 462, then z =? |
93% |
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PS-2e2sbk |
[img]20120326023212877_3611.jpg[/img][br/]The graph above shows the combined revenue, in billions of dollars, of a chain of food stores for each year over a four-year period. In 1994 a certain stor... |
72% |
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DS-7b2sck |
When 15n, where n is a positive integer, is divided by 6, the remainder is x. What is the value of x?[br/](1) When n is divided by 2, the remainder is 0.[br/](2) When n is divided by 3, the remaind... |
75% |
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PS-462sdk |
In a survey, 2,500 executives were each asked whether they read Newsletter A or Newsletter B. According to the survey, 55 percent of the executives read Newsletter A, 62 percent read Newsletter B, ... |
94% |
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PS-3b2pyk |
If x＞0.9, which of the following could be the value of x? |
79% |
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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-a61ubk |
What is the median number of employees assigned per project for the projects at Company Z?[br/](1)25 percent of the projects at Company Z have 4 or more employees assigned to each project.[br/](2)3... |
74% |
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DS-912sek |
One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee. The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y. Is x＜0.8?[b... |
31% |
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PS-e71zek |
If k = -1, which of the following is (are) true?[br/]I.[math]k^k = k[/math][br/]II.[math]|k|=-k[/math][br/]III.[math]k^0=-k[/math] |
81% |
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PS-f32sgk |
[img]20120326023835955_3616.jpg[/img][br/]The figure above represents a system of roads along which traffic flows in the direction indicated by the arrows. If the traffic were to split evenly at ea... |
74% |
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DS-562sik |
What is the remainder when the sum of the positive integers x and y is divided by 6?[br/](1) When x is divided by 6, the remainder is 3.[br/](2) When y is divided by 6, the remainder is 1. |
89% |
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DS-f62skk |
If xy ≠ 0, what is the value of [math]1/x + 1/y[/math] ?[br/](1) [math]1/(x+y)=-1[/math][br/](2) xy=6(x+y)
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87% |
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PS-4a2slk |
If b(a+1)=b, then ab = |
98% |
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PS-f12oqk |
[img]20120325222628614_3482.jpg[/img][br/]In the rectangular solid above, the three sides shown have areas 12, 15, and 20, respectively. What is the volume of the solid? |
78% |
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GWD模考测试题26
