| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-9a2h9k |
In the formula V =[math]1/((2r)^3)[/math],if r is halved, then V is multiplied by |
77% |
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PS-ed309k |
The product P of two prime numbers is between 9 and 55. If one of the prime numbers is greater than 2 but less than 6 and the other is greater than 13 but less than 25, then P = |
96% |
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|
PS-7d2xdk |
In the xy-plane, line n passes through the origin and has slope 4. If points (1, c) and (d, 2) are on line n, what is the value of [math]c/d[/math]? |
87% |
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|
PS-d924fk |
When positive integer x is divided by positive integer y, the remainder is 9. If [math]x/y = 96.12[/math], what is the value of y? |
83% |
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|
DS-012yik |
The operation* represents either addition, subtraction, or multiplication of integers, what is the value of 1*0?[br/](1) 0*2=2[br/](2) 2*0=2
|
50% |
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PS-6b2cok |
If a positive integer n is divisible by both 5 and 7, then n must also be divisible by which of the following?[br/]I 12[br/]II 35[br/]III 70 |
79% |
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PS-fe2gok |
The ratio of two quantities is 3 to 4. If each of the quantities is increased by 5, what is the ratio of these two new quantities? |
88% |
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DS-612vsk |
If p, s, and t are positive prime numbers, what is the value of [math]p^3s^3t^3[/math] ?[br/](1) [math]p^3st = 728[/math][br/](2) t = 13
|
65% |
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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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PS-7a2y7k |
Chris mixed 3 pounds of raisins with 4 pounds of nuts. If a pound of nuts costs 3 times as much as a pound of raisins, then the total cost of the raisins was what fraction of the total cost of the ... |
91% |
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DS-941u4k |
A can manufacturing company has 5 identical machines, each of which produces cans at the same constant rate. How many cans will all 5 machines produce running simultaneously for z hours?[br/](1)Run... |
89% |
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|
DS-1128bk |
If x is an integer, is x |x| ＜ [math]2^X[/math] ?[br/](1)x ＜ 0[br/](2)x = -10 |
91% |
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DS-b31uyk |
Is [math]x^2 + y^2 ＞ 6[/math]?[br/](1)[math](x + y)^2 ＞ 6[/math][br/](2)xy = 2 |
67% |
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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-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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|
DS-7c2ytk |
A parent established a college fund for his daughter. Each year the parent made a contribution to the fund, and each year he increased his contribution by a constant amount. If he made a contributi... |
90% |
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|
DS-312xlk |
The total number of printers and computers at a certain company is 36. How many printers does the company have?[br/](1) The ratio of the number of the company’s printers to the number of its comput... |
96% |
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|
DS-6026tk |
In a certain office, 50 percent of the employees are college graduates and 60 percent of the employees are over 40 years old. If 30 percent of those over 40 have master's degrees, how many of the e... |
85% |
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|
DS-ff2z5k |
A certain one-day seminar consisted of a morning session and an afternoon session. If each of the 128 people attending the seminar attended at least one of the two sessions, how many of ... |
31% |
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|
PS-57229k |
How many different 6-letter sequences are there that consist of 1 A,2 B's,and3 C's ? |
49% |
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|
DS-c527lk |
[img]DS11102.jpg[/img][br/]Quadrilateral RSTU shown above is a site plan for a parking lot in which side RU is parallel to side ST and RU is longer than ST. What is the area of the parking lot?[br/... |
86% |
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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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DS-fa26mk |
What is the value of b + c ?[br/](1)ab + cd + ac + bd = 6[br/](2)a + d = 4 |
94% |
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DS-83289k |
If [math]z^n[/math]=1, what is the value of z?[br/](1)n is a nonzero integer.[br/](2)z ＞ 0 |
58% |
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|
PS-2523xk |
A certain right triangle has sides of length x, y, and z, where x ＜ y ＜ z. If the area of this triangular region is 1, which of the following indicates all of the possible values of y ? |
67% |
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|
DS-5e2o4k |
A certain dealership has a number of cars to be sold by its salespeople. How many cars are to be sold?[br/](1) If each of the salespeople sales 4 of the cars, 23 cars will remain unsold.[br/](2) If... |
89% |
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|
PS-7523zk |
If [math]2x^2 - y^2 = 2xy[/math], then [math](x + y)^2 =[/math] |
92% |
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DS-292auk |
If x and y are integers, is xy even?[br/](1)x = y+1[br/](2)[math]x/y[/math]is an even integer. |
83% |
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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-922o9k |
Which of the following is equal to [math][1/(sqrt3-sqrt2)]^2[/math]? |
94% |
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DS-92280k |
[img]ds2880.jpg[/img][br/]In the figure above,what is the ratio [m](KN)/(MN)[/m]?[br](1)The perimeter of rectangle KLMN is 30 meters[br](2)The tfree small rectangles have the same dimensions |
53% |
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PS-8934jk |
Working simultaneously at their respective constant rates, Machines A and B produce 800 nails in x hours. Working alone at its constant rate, Machine A produces 800 nails in y hours. In terms of x ... |
85% |
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PS-342e7k |
In a certain furniture store, each week Nancy earns a salary of $240 plus 5 percent of the amount of her total sales that exceeds $800 for the week. If Nancy earned a total of $450 one week, what w... |
86% |
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|
DS-0828dk |
The inflation index for the year 1989 relative to the year 1970 was 3.56, indicating that, on the average, for each dollar spent in 1970 for goods, $3.56 had to be spent for the same goods in 1989.... |
87% |
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|
PS-c32fpk |
If 0≤x≤4 and y＜ 12, which of the following CANNOT be the value of xy? |
95% |
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PS-f12ejk |
Diana bought a stereo for $530, which was the retail price plus a 6 percent sales tax. How much money could she have saved if she had bought the stereo at the same retail price in a neighboring sta... |
86% |
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PS-801zzk |
The sum of all the integers k such that -26 ＜ k ＜ 24 is |
85% |
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PREP模考试卷03
