| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-4e2wvk |
Company C produces toy trucks at a cost of $5.00 each for the first 100 trucks and $3.50 for each additional truck. If 500 toy trucks were produced by Company C and sold for $10.00 each, what was C... |
98% |
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PS-4b2wwk |
The sum of the first k positive integers is equal to [math](k（k+1）)/2[/math]. What is the sum of the integers from n to m, inclusive, where 0 ＜ n ＜ m ? |
80% |
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DS-bb2wxk |
If f is the function defined by f(x) = 2x for x ≥ 0 and [math]f(x) = x^2[/math] for x ＜ 0, what is the value of f(c) ?[br/](1) |c|= 2[br/](2) c ＜ 0 |
67% |
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DS-182wyk |
A total of 20 amounts are entered on a spreadsheet that has 5 rows and 4 columns; each of the 20 positions in the spreadsheet contains one amount. The average (arithmetic mean) of the amounts in ro... |
75% |
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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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PS-912wzk |
At a certain carpet factory, if carpeting is moving continuously through a dryer at a constant rate of 21,600 square feet per hour, how many [u]seconds[/u] does it take for an area of 1 square foot... |
69% |
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DS-c82x0k |
In the xy-plane, line a and line b have the same slope. If the y-intercept of line a is –1, what is the y-intercept of line b ?
(1) The x-intercept of line a is –1.
(2) Line b passes through the po... |
83% |
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PS-df20dk |
The number of defects in the first five cars to come through a new production line are 9, 7, 10, 4, and 6, respectively. If the sixth car through the production line has either 3, 7, or 12 defects,... |
60% |
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PS-0d2x1k |
At the start of an experiment, a certain population consisted of 3 animals. At the end of each month after the start of the experiment, the population size was double its size at the beginning of t... |
94% |
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PS-0c2kbk |
if [math]t=1/(2^9*5^3)[/math] is expressed as a terminating decimal,how many zeros will t have between the decimal point and the first nonzero digit to the right of the decimal point? |
62% |
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DS-ed2x2k |
If n is an integer, is [math]10^n[/math] ≤ 0.001 ?[br/](1) n ≤ -2[br/](2) n ＞ -5 |
83% |
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PS-c32x3k |
If x + y + z = 0, x + 2y + 3z = 0, and y ≠ 0, then [math]x/y[/math] = |
91% |
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DS-3c2x4k |
Last month, a certain manufacturer sold a total of 1,000 unites of its two products, A and B. The selling price of each unit of product A was $1,500, and the selling price of each unit of product B... |
80% |
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PS-cb2x5k |
The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 10 percent less than the charge for a single room at Hotel G. The charge for a single roo... |
78% |
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DS-7a2x6k |
Is t between 35 and 55 ?[br/](1) t is between 38 and 49.[br/](2) t is between 42 and 52.
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91% |
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DS-9d2x7k |
What is the value of x ?[br/](1) ( |x| – 1)(x – 2) = 0[br/](2) -1 ≤ x ≤ 1
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91% |
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PS-c72x8k |
John has 5 friends who want to ride in his new car that can accommodate only 3 passengers at a time. How many different combinations of 3 passengers can be formed from the 5 friends? |
91% |
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DS-072x9k |
If r ＞ 0, is rs ＜ 0 ?[br/](1) s ＜ 0[br/](2) s ＜ r |
97% |
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PS-da2xak |
The sequence [math]a_1[/math], [math]a_2[/math], …, [math]a_n[/math], … is such that [math]a_n = 4a_(n – 1) – 3[/math] for all integers n ＞ 1. If [math]a_3 = x[/math], then [math]a_1[/math] = |
94% |
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DS-fe2xbk |
Of the 60 animals on a certain farm, [math]2/3[/math] are either pigs or cows. How many of the animals are cows?[br/](1) The farm has more than twice as many cows as it has pigs.[br/](2) The farm h... |
45% |
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DS-b52xck |
A store purchased a Brand C computer for the same amount that it paid for a Brand D computer and then sold them both at higher prices. The store’s gross profit on the Brand C computer was what perc... |
62% |
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DS-da2avk |
In triangle ABC, point X is the midpoint of side AC and point Y is the midpoint of side BC. If point R is the midpoint of line segment XC and if point S is the midpoint of line segment YC, what is ... |
69% |
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PS-5124nk |
On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 60 percent of the passengers with round-trip tickets did ... |
62% |
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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-f62osk |
If M is the least common multiple of 90, 196, and 300, which of the following is NOT a factor of M? |
59% |
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DS-962xek |
For each positive integer n, the integer n* is defined by n* = [math]n^2[/math] + 1. What is the value of the positive integer k ?[br/](1) When k is divided by 4, the remainder is 1.[br/](2) 18 ≤ k... |
71% |
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PS-6f2xfk |
When the positive integer n is divided by 13, the remainder is 4. What is the remainder when 2n – 3 is divided by 13 ? |
93% |
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PS-ef2wsk |
On January 1, 1994, Jill invested P dollars in an account that pays interest at a rate of 8 percent per year, compounded annually on December 31. If there were no other deposits or withdrawals in t... |
94% |
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PS-432xgk |
[img]20120408165453879_3796.jpg[/img][br/]The figure shows two squares, and the points W, X, Y, and Z lie on a line. If the distance between W and X is equal to the distance between X and Y and to ... |
78% |
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DS-ac2xhk |
A certain database charges users a registration fee of x dollars, and if charges registered users y dollars per file downloaded. If there are no other charges for users of this database, what is th... |
93% |
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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-2c2xik |
Is [math]h^2 = h[/math] ?[br/](1) h + h = h[br/](2) h – h = h
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91% |
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PS-e72xjk |
A coat’s original price of $112 was reduced by 20 percent for a sale. If the sale price was then reduced by 20 percent, which of the following expresses the price of the coat after the second price... |
95% |
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PS-e42xkk |
If k is a two-digit positive integer with tens digit x and units digit y, then [math]k^2[/math] = |
93% |
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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-9b2xmk |
If x and y are positive integers and r is the remainder when [math]3^(4x + 2) + y[/math] is divided by 10, what is the value of r?[br/](1) x = 25[br/](2) y = 1
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59% |
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PS-922xnk |
A gumball dispenser has 24 gumballs, 12 white and 12 black, which are dispensed at random. If the first 3 gumballs dispensed are black, what is the probability that the next gumball dispensed will ... |
88% |
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GWD模考测试题21
