| 题号 |
题目内容 |
平均正确率 |
操作 |
PS-112vrk |
If [math]x^2 = 4[/math] and [math]y^2 =7[/math], then [math]x^6 – y^4 =[/math] |
95% |
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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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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
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65% |
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DS-ab2vtk |
If x and y are integers, what is the value of [math]2x^(6y) - 4[/math] ?[br/](1) [math]x^(2y) = 16[/math][br/](2) xy = 4 |
88% |
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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-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-382vuk |
If N = 1/3 + 1/(3^2) + 1/(3^3), then N is between |
92% |
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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-892vvk |
Is x ＜ 0 ?[br/](1) [math]x^3 ＜ x^2[/math][br/](2) [math]x^3 ＜ x^4[/math] |
53% |
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PS-ef2vwk |
A rectangular floor that measures 8 meters by 10 meters is to be covered with carpet squares that each measure 2 meters by 2 meters. If the carpet squares cost $12 apiece, what is the total cost fo... |
95% |
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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-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-a32vxk |
Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences. If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?[... |
68% |
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PS-512vyk |
A certain pilot flew 400 miles to City K at an average speed of 350 miles per hour with the wind and made the trip back at an average speed of 250 miles per hour against the wind. Which of the foll... |
58% |
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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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PS-b32vzk |
If 2, x, y, and z are different positive integers whose average (arithmetic mean) is 10, what is the greatest possible value of z ? |
71% |
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PS-ae2w0k |
Which of the following is closest to [math]10^(180) – 10^(30)[/math] ? |
89% |
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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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PS-532w1k |
If x, y, and z are consecutive even positive integers, which of the following could be equal to x + y + z ? |
88% |
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DS-752tik |
Last year in a group of 30 businesses, 21 reported a net profit and 15 had investments in foreign markets. How many of the businesses did not report a net profit nor invest in foreign markets last ... |
85% |
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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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DS-232w2k |
If –2x ＞ 3y, is x negative?[br/](1) y ＞ 0[br/](2) 2x + 5y – 20 = 0 |
54% |
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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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PS-e32w3k |
The positive numbers w, x, y, and z are such that x is 20 percent greater than y, y is 20 percent greater than z, and w is 20 percent less than x. What percent greater than z is w ? |
74% |
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DS-9b2w4k |
Machine M processes a certain chemical product at a constant rate. Does machine M process the product at a rate that is greater than 25 grams per second? (1 kilogram = 1,000 grams)[br/](1) Machine ... |
89% |
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DS-d12w5k |
Is –7 ＜ y ＜ 10 ?[br/](1) y ＞ -6[br/](2) y ＜ 0
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91% |
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PS-e22u7k |
If k is an integer and [math](0.0025)(0.025)(0.00025)×10^k[/math] is an integer, what is the least possible value of k? |
87% |
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PS-f72w6k |
Jacob purchased 100 boxes of oranges at $8.00 per box. He sold 8 of the boxes at $4.00 per box to Company A, and he sold the rest of the boxes at x dollars per box to Company B. If Jacob’s profit f... |
90% |
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PS-f52w7k |
A sum of money was divided between John and Anne such that the ratio of John’s share to Anne’s share was 5 to 3. If John’s share exceeded [math]5/9[/math] of the sum of money by $50, what was Anne’... |
82% |
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DS-f22w8k |
From May 1 to May 30 in the same year, the balance in a checking account increased. What was the balance in the checking account on May 30 ?[br/](1) If, during this period of time, the increase in ... |
64% |
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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-612w9k |
What is the probability that event E or event F or both will occur?[br/](1) The probability that event E will occur is 0.6.[br/](2) The probability that event F will occur is 0.4.
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46% |
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PS-ef2wak |
If Diana’s stamp collection, [math]4/5[/math] of the stamps are Canadian, and [math]3/7[/math] of the Canadian stamps were issued before 1940. If 192 stamps in Diana’s collection are Canadian stamp... |
86% |
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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-902wbk |
For a certain car repair, the total charge consisted of a charge for parts, a charge for labor, and a 6 percent sales tax on both the charge for parts and the charge for labor. If the charge for pa... |
83% |
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DS-3b2wck |
If x and y are integers, is y an even integer?[br/](1) [math]2y – x = x^2 – y^2[/math][br/](2) x is an odd integer.
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42% |
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PS-d22wdk |
For any number x, [ x ] denotes the greatest integer less than or equal to x. What is the value of [ [math]-(10)/(4)[/math] ]? |
87% |
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GWD模考测试题18
