| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-a92sqk |
what is 35 percent of the sum of 1.4 and 1/5? |
97% |
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PS-cf2ubk |
A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percen... |
62% |
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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-d823kk |
If the average (arithmetic mean) of positive integers x, y, and z is 10, what is the greatest possible value of z ? |
92% |
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DS-9d2axk |
A department manager distributed a number of pens, pencils, and pads among the staff in the department, with each staff member receiving x pens, y pencils, and z pads. How many staff members were i... |
64% |
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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-ae1xrk |
If each of the 8 employees working on a certain project received an award, was the amount of each award the same?[br/](1)The standard deviation of the amounts of the 8 awards was 0.[br/](2)The tota... |
85% |
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PS-652ukk |
A cash register in a certain clothing store is the same distance from two dressing rooms in the store. If the distance between the two dressing rooms is 16 feet, which of the following could be the... |
88% |
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DS-de2ulk |
What is the value of [math]a^(-2)b^(-3)[/math] ?
(1) [math]a^(-3)b^(-2) = 36^(-1)[/math]
(2) [math]ab^(-1) = 6^(-1)[/math] |
78% |
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PS-2023vk |
If [math]x^2 - 2 ＜ 0[/math], which of the following specifies all the possible values of x ? |
93% |
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PS-492umk |
At the end of each year, the value of a certain antique watch is c percent more than its value one year earlier, where c has the same value each year. If the value of the watch was k dollars on Jan... |
80% |
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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-5323rk |
Of the books standing in a row on a shelf, an atlas is the 30th book from the left and the 33rd book from the right. If 2 books to the left of the atlas and 4 books to the right of the atlas are re... |
88% |
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DS-6e2unk |
Some computers at a certain company are Brand X and the rest are Brand Y. If the ratio of the number of Brand Y computers to the number of Brand X computers at the company is 5 to 6, how many of th... |
95% |
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DS-032uok |
If [math]R = P/Q[/math] , is R ≤ P ?[br/](1) P ＞ 50[br/](2) 0 ＜ Q ≤ 20 |
69% |
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DS-6c250k |
Is it true that a ＞ b?[br/](1)2a＞2b[br/](2)a + c＞ b + c |
90% |
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PS-342uqk |
[img]20120407195048426_3698.jpg[/img][br/]The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals th... |
83% |
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PS-382urk |
Departments A, B, and C have 10 employees each, and department D has 20 employees. Departments A, B, C, and D have no employees in common. A task force is to be formed by selecting 1 employee from ... |
90% |
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DS-b51xik |
If the product of the digits of the two-digit positive integer n is 2, what is the value of n ?[br/](1)n is odd.[br/](2)n is greater than 20. |
88% |
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DS-462usk |
If the sum of three integers is even, is the product of the three integers a multiple of 4 ?[br/](1) All three integers are equal.[br/](2) All three integers are even.
|
70% |
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DS-ba2utk |
Martin has worked for the last 30 years. If his average (arithmetic mean) total annual earnings for the first 5 years is $15,000, what is his average total annual earnings for the last 5 years?[br/... |
81% |
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PS-0424qk |
The value of [math](9*10^7)(9*10^8)[/math] is closest to which of the following? |
83% |
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PS-f32uuk |
If x ≥ 0 and [math]x =sqrt(8xy-16y^2)[/math] , then, in terms of y, x = |
91% |
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PS-7e2uvk |
[img]20120407200612629_3703.jpg[/img][br/]The table gives three factors to be considered when choosing an Internet service provider and the percent of the 1,200 respondents to a survey who cited th... |
71% |
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DS-a92uwk |
Is |k| = 2 ?[br/](1) [math] k^2 = 4[/math][br/](2) k = |-2|
|
93% |
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DS-912uxk |
[img]20120407200833489_3705.jpg[/img][br/]In the figure shown, the circle has center O and radius 50, and point P has coordinates (50,0). If point Q (not shown) is on the circle, what is the length... |
50% |
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PS-e61zak |
The function f is defined by [math]f(x) = - 1/x[/math] for all nonzero numbers x. If [math]f(a) = - 1/2[/math] and [math]f(ab) = 1/6[/math], then b = |
84% |
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|
DS-9b1xkk |
A school administrator will assign each student in a group of n students to one of m classrooms. If 3 ＜ m ＜ 13 ＜ n, is it possible to assign each of the n students to one of the m classrooms so ... |
47% |
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PS-512uyk |
The toll for crossing a certain bridge is $0.75 each crossing. Drivers who frequently use the bridge may instead purchase a sticker each month for $13.00 and then pay only $0.30 each crossing durin... |
67% |
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DS-a929rk |
Robots X, Y, and Z each assemble components at their respective constant rates. If [math]r_x[/math] is the ratio of Robot X's constant rate to Robot Z's constant rate and [math]r_y[/math] is the ra... |
87% |
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PS-da2uzk |
[img]20120407201106879_3707.jpg[/img][br/]In the figure shown, if the area of the shaded region is 3 times the area of the smaller circular region, then the circumference of the larger circle is ho... |
74% |
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DS-d92v0k |
If n is an integer between 10 and 99, is n ＜ 80 ?[br/](1) The sum of the two digits of n is a prime number.[br/](2) Each of the two digits of n is a prime number. |
82% |
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PS-4121lk |
Of the families in City X in 1994, 40 percent owned a personal computer. The number of families in City X owning a computer in 1998 was 30 percent greater than it was in 1994, and the total number ... |
81% |
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PS-862v1k |
If a rectangular room measures 10 meters by 6 meters by 4 meters, what is the volume of the room in cubic [u]centimeters[/u]? (1 meter = 100 centimeters) |
89% |
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DS-d72v2k |
For what percent of those tested for a certain infection was the test accurate; that is, positive for those who had the infection and negative for those who did not have the infection?[br/](1) Of t... |
52% |
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DS-782v3k |
If x ≠ 0, what is the value of [math](|x|)/(x)[/math]?[br/](1) x ＞ 0[br/](2) x = 5 |
91% |
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PS-e82v4k |
Which of the following fractions has the greatest value? |
82% |
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GWD模考测试题15
