| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-da21mk |
If Henry were to add 5 gallons of water to a tank that is already [math]3/4[/math] full of water, the tank would be [math]7/8[/math] full. How many gallons of water would the tank hold if it were f... |
96% |
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PS-9e2ojk |
The function f is defined for each positive three-digit integer n by [math]f(n)=2^x3^y5^z[/math], where x, y and z are the hundreds, tens, and units digits of n, respectively. If m and v are three-... |
76% |
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PS-91244k |
At a certain food stand, the price of each apple is ￠ 40 and the price of each orange is ￠ 60. Mary selects a total of 10 apples and oranges from the food stand, and the average (arithmetic mean)... |
67% |
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DS-3f1xzk |
Professor Vasquez 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 ... |
92% |
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DS-d11y0k |
If x and y are positive integers, what is the value of x?[br/](1)[math]3^x5^y = 1,125[/math][br/](2)y = 3 |
75% |
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PS-02245k |
If |d - 9| = 2d, then d = |
90% |
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PS-1d24jk |
There are 11 women and 9 men in a certain club. If the club is to select a committee of 2 women and 2 men, how many different such committees are possible? |
91% |
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PS-bc1znk |
[img]0310.jpg[/img][br/]In the figure shown, two identical squares are inscribed in the rectangle. If the perimeter of the rectangle is [math]18sqrt2[/math], then what is the perimeter of each square? |
84% |
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DS-dd1y1k |
Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?[br/](1)Two of the interior angles of ABCD are right angles.[br/](2)The degree measure of angle ABC is twice t... |
41% |
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DS-191y2k |
$10,000 is deposited in a certain account that pays r percent annual interest compounded annually, the amount D(t), in dollars, that the deposit will grow to in t years is given by [math]D(t) = 10,... |
89% |
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DS-351y3k |
If a and b are integers, is b even?[br/](1)3a + 4b is even.[br/](2)3a + 5b is even. |
75% |
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PS-ea2omk |
Working alone at its constant rate, machine K took 3 hours to produce [math]1/4[/math] of the units produced last Friday. Then machine M started working and the two machines, working simultaneously... |
85% |
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DS-892ook |
If x + y is an integer, is y an integer?[br/](1)x – y is an integer.[br/](2)x + 2y is an integer. |
67% |
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PS-281zfk |
A certain computer program generates a sequence of numbers [math]a_1[/math], [math]a_2[/math], … , an such that [math]a_1 = a_2 = 1[/math] and [math]a_k=a_(k-1)+2a_(k-2)[/math] for all integers k s... |
92% |
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PS-362opk |
At a certain bookstore, the regular price of each book is 20 percent less than its list price. If during a sale the price of each book at the store was 15 percent less than its regular price, then ... |
81% |
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DS-df2ouk |
What is the value of the ratio of x to [math]y^2[/math]?[br/](1) The ratio of [math]x^2[/math] to y is [math]5/3[/math].[br/](2) The ratio of x to 1 is [math]5/3[/math].
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90% |
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PS-da1zpk |
Box W and Box V each contain several blue sticks and red sticks, and all of the red sticks have the same length. The length of each red stick is 18 inches less than the average length of the sticks... |
83% |
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DS-502owk |
If k is a positive integer, is k the square of an integer?[br/](1) k is divisible by 4.[br/](2) k is divisible by exactly 4 different prime numbers. |
59% |
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PS-6a2kdk |
If n is positive, which of the following is equal to [math]1/(sqrt(n+1)-sqrtn)[/math] |
93% |
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DS-962oxk |
Bob, Mia, and Lou each own a number of shares of stock in a company. How many shares does Lou own?[br/](1) Bob and Mia together own a total of 800 shares.[br/](2) Bob and Lou together own a total o... |
95% |
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DS-fe2p1k |
In the xy-plane, what is the x-intercept of a certain line?[br/](1) The line passes through the point (0,2).[br/](2) The y-intercept of the line is 2.
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85% |
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DS-0c1umk |
[img]0322.jpg[/img] What is the volume of the cube above?[br/](1)The surface area of the cube is 600 square inches.[br/](2)The length of diagonal AB is [math]10sqrt3[/math] inches. |
87% |
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PS-952ozk |
[math](0.8^(-5))/(0.4^(-4))=[/math] |
90% |
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DS-cd2p0k |
By what percent was the price of a certain television set discounted for a sale?[br/](1) The price of the television set before it was discounted for the sale was 25 percent greater than the discou... |
80% |
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PS-cb243k |
For a certain race, 3 teams were allowed to enter 3 members each. A team earned 6 - n points whenever one of its members finished in nth place, where 1 ≤ n ≤ 5. There were no ties, disqualification... |
58% |
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DS-1d2p2k |
Is x＜y ?[br/](1) The ratio of x to y is [math]7/9[/math].[br/](2) xy＞0 |
72% |
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DS-512p4k |
For each landscaping job that takes more than 4 hours, a certain contractor charges a total of r dollars for the first 4 hours plus 0.2r dollars for each additional hour or fraction of an hour, whe... |
67% |
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PS-5b2p5k |
In the rectangular coordinate system, points (4, 0) and (-4, 0) both lie on circle C. What is the maximum possible value of the radius of C ? |
77% |
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PS-151ztk |
[img]0319.jpg[/img][br/]The graph of which of the following equations is a straight line that is parallel to line l in the figure above? |
76% |
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DS-aa2p6k |
A train traveled from station X to station Y at a constant speed of 88 feet per second. Is the distance that the train traveled from station X to Station Y greater than 40 miles? (1 mile = 5,280 fe... |
80% |
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PS-872p7k |
There are 5 cars to be displayed in 5 parking spaces with all the cars facing the same direction. Of the 5 cars, 3 are red, 1 is blue, and 1 is yellow. If the cars are identical except for color, h... |
65% |
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DS-a32p8k |
If x is an integer, is 3x + 7 even?[br/](1) (x – 5)(x + 1) = 0[br/](2) x is a factor of 105. |
86% |
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PS-af2nvk |
On Saturday morning, Malachi will begin a camping vacation and he will return home at the end of the first day on which it rains. If on the first three days of the vacation the probability of rain ... |
84% |
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PS-e2203k |
A certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996. If ... |
84% |
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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-472pak |
If [math]x^2+y^2=1[/math], is x + y = 1?[br/](1) xy = 0[br/](2) y = 0 |
68% |
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PS-cf24dk |
Of the following, which is greatest? |
94% |
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GWD模考测试题30
