| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-63217k |
[img]0601.jpg[/img][br/]According to the table above, what was the total number of watts of electricity used for the four appliances in the household on May 1? |
94% |
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DS-211vlk |
What is the ratio of the average (arithmetic mean) height of students in class X to the average height of students in class Y?[br/](1)The average height of the students in class X is 120 centimeter... |
75% |
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PS-e9218k |
If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible? |
60% |
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PS-7a20tk |
[math]sqrt[2sqrt63 + 2/(8+3sqrt7)] =[/math] |
91% |
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PS-7c20uk |
The infinite sequence [math]a_1[/math], [math]a_2[/math],…, [math]a_n[/math],… is such that [math]a_1 = 2[/math], [math]a_2 = -3[/math], [math]a_3 = 5[/math], [math]a_4 = -1[/math], and [math]a_n =... |
93% |
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PS-c0219k |
The ratio of the number of red cars in a certain parking lot to the number of black cars is 3 to 8. If there are 72 black cars in the lot, how many red cars are there in the lot? |
97% |
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DS-2b1vmk |
What is the value of |x + 7|?[br/](1)|x + 3|= 14[br/](2)[math](x + 2)^2 = 169[/math] |
81% |
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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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PS-f721bk |
In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer, t... |
91% |
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DS-591vnk |
When 200 gallons of oil were removed from a tank, the volume of oil left in the tank was [math]3/7[/math] of the tank’s capacity. What was the tank’s capacity?[br/](1)Before the 200 gallons were re... |
91% |
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PS-0d21ck |
A certain business produced x rakes each month form November through February and shipped [math]x/2[/math] rakes at the beginning of each month from March through October. The business paid no stor... |
69% |
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DS-791vok |
For a certain play performance, adults’ tickets were sold for $12 each and children’s tickets were sold for $8 each. How many children’s tickets were sold for the performance?[... |
92% |
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DS-ee1vpk |
What is the remainder when the positive integer n is divided by 3?[br/](1)The remainder when n is divided by 2 is 1.[br/](2)The remainder when n + 1 is divided by 3 is 2. |
71% |
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PS-4021dk |
If the average (arithmetic mean) of x, y, and 20 is 10 greater than the average of x, y, 20, and 30, what is the average of x and y? |
86% |
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DS-2a1vqk |
If x and y are integers, is x + y greater than 0?[br/](1)x is greater than 0.[br/](2)y is less than 1. |
96% |
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DS-9f1vrk |
What is the value of [math](3^(-(x + y))) /( 3^(-(x - y)))[/math]?[br/](1)x = 2[br/](2)y = 3 |
76% |
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PS-3421ek |
A driver completed the first 20 miles of a 40-mile trip at an average speed of 50 miles per hour. At what average speed must the driver complete the remaining 20 miles to achieve an average speed o... |
77% |
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SC-7cdc8h |
Were it not for the fusion-powered heat and radiation that rush from its core, [u]instead its own weight would cause a star to collapse[/u]. |
80% |
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DS-451vtk |
In a survey of 200 college graduates, 30 percent said they had received student loans during their college careers, and 40 percent said they had received scholarships. What percent of those surveye... |
79% |
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PS-801zzk |
The sum of all the integers k such that -26 ＜ k ＜ 24 is |
85% |
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PS-6421fk |
A wholesaler bought 1,200 radios for $18 each. The wholesaler sold 60 percent of the radios for $30 each and the rest for $15 each. What was the wholesaler’s average (arithmetic mean) profit per ra... |
95% |
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PS-9b231k |
A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3... |
72% |
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DS-bd1vuk |
[img]0623.jpg[/img][br/]In the figure shown, what is the area of the circular region with center O and diameter BC?[br/](1)[math](BC)/(AB) = 3/4[/math][br/](2)BD = 25 |
93% |
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DS-d21vvk |
Is |x|=|y|?[br/](1)x - y = 6[br/](2)x + y = 0 |
81% |
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PS-f621gk |
If the number 52,1n9, where n represents the tens digit, is a multiple of 3, then the value of n could be which of the following? |
79% |
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DS-5c1vwk |
If r, s, and t are positive integers, is r + s + t even?[br/](1)r + s is even.[br/](2)s + t is even. |
81% |
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DS-351vxk |
In the xy-plane, is the slope of line k positive?[br/](1)Line k passes through the points (-1, -7) and (2, 5).[br/](2)Line k has equation y = 4x - 3. |
96% |
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PS-6721hk |
Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for $1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues... |
51% |
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PS-ac2onk |
The membership of a committee consists of 3 English teachers, 4 Mathematics teachers, and 2 Social Studies teachers. If 2 committee members are to be selected at random to write the committee’s rep... |
92% |
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DS-ee1vyk |
Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy?[br/](1)She bought $4.40 worth of stamps.[br/](2)She bought an equal number of $0.15 stamps and $0.29 stamps. |
47% |
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PS-0121ik |
In the coordinate plane, a circle has center (2, -3) and passes through the point (5, 0). What is the area of the circle? |
92% |
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DS-9e1vzk |
If [math]x/600 = y/300[/math], is y equal to 1,000?[br/](1)x + y = 3,000[br/](2)3x = 6,000 |
92% |
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PS-4f21jk |
Enrollment in City College in 1980 was [math]83\1/3[/math] percent of enrollment in 1990. What was the percent increase in the college’s enrollment from 1980 to 1990? |
73% |
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DS-541w0k |
Professor Vásquez gave a quiz to two classes. Was the range of scores for the first class equal to the range of scores for the second class?[br/](1)In each class, the number of students taking the ... |
89% |
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PS-f621kk |
The operation ○ is defined by the equation x ○ y = [math](x-y)/(x+y)[/math], where [math]y != -x[/math]. If 3 ○ y = 5 ○ 4, then y = |
94% |
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DS-d81w1k |
In the xy-plane, line l and line k intersect at the point [math](16/5, 12/5)[/math]. What is the slope of line l?[br/](1)The product of the slopes of line l and line k is -1.[br/](2)Line k passes t... |
85% |
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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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GWD模考测试题05
