| 题号 |
题目内容 |
平均正确率 |
操作 |
DS-b11xfk |
If n is a positive integer, what is the value of the hundreds digit of [math]30^n[/math]?[br/](1)[math]30^n ＞ 1,000[/math][br/](2)n is a multiple of 3. |
69% |
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DS-6c250k |
Is it true that a ＞ b?[br/](1)2a＞2b[br/](2)a + c＞ b + c |
90% |
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DS-9833ik |
If 90 students auditioned for the school musical, how many were accepted?
(1) 2/3 of the boys and 1/3 of the girls who auditioned were accepted.[br/](2) 26 of the boys who auditioned were accepted.
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87% |
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PS-812t4k |
If [math]P(r)=8r/(1-r)[/math], for what value of r does [math]P(r)=1/2(P(3))[/math]? |
77% |
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PS-ea2grk |
If the two-digit integers M and N are positive and have the same digits, but in reverse order, which of the following CANNOT be the sum of M and N ? |
86% |
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DS-a51wyk |
In the xy-plane, point (r, s) lies on a circle with center at the origin. What is the value of [math]r^2+s^2[/math]?[br/](1)The circle has radius 2.[br/](2)The point ([math]sqrt(2)[/math], [math]-s... |
81% |
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PS-742izk |
The average distance between the Sun and a certain planet is approximately 2.3 x [math]10^14[/math] inches. Which of the following is closest to the average distance between the Sun and the planet,... |
92% |
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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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DS-5b25vk |
What is the value of integer n ?[br/](1)n(n+1) = 6[br/](2)[math]2^2n[/math] = 16 |
72% |
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DS-6f1wgk |
In the xy-plane,region R consists of all the points (x, y) such that 2x + 3y = 6. Is the point (r, s)in region R ?[br/](1)3r +2s =6[br/](2)r = 3 and s = 2 |
42% |
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DS-7227fk |
If Juan had a doctor's appointment on a certain day, was the appointment on a Wednesday?[br/](1)Exactly 60 hours before the appointment, it was Monday.[br/](2)The appointment was between 1:00 p.m. ... |
78% |
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PS-d92sfk |
Which of the following is equal to [math]5^(17)× 4^9[/math]? |
91% |
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PS-3b215k |
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes ... |
87% |
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PS-512imk |
Rectangular floors X and Y have equal area. If floor X is 12 feet by 18 feet and floor Y is 9 feet wide, what is the length of floor Y in feet? |
97% |
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PS-8239ak |
Working alone at their respective constant rates, machine A and machine B can fill a certain order in 3 hours and 6 hours, respectively. If the two machines work simultaneously at their respective ... |
92% |
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PS-ea205k |
In 1995 a certain store had 1,800 tools in stock that had been purchased for $30 each. If 1,000 of these tools were sold in 1995 for $40 each and the remaining 800 were sold in 1996 for $50 each, h... |
87% |
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DS-ac2xzk |
All 48 seniors in a certain high school take one of two English classes. What is the average (arithmetic mean) height of the seniors in this school?[br/]
(1) In the school, the average height of t... |
82% |
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DS-cb2wgk |
On a given day, 50 people took a test that is designed to measure a candidate’s aptitude. Some of the 50 people will take the test in the morning, and the remaining of the 50 people will take the t... |
87% |
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PS-002gtk |
If the average (arithmetic mean) of the four numbers K, 2K + 3, 3K - 5, and 5K + 1 is 63, what is the value of K? |
95% |
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DS-8728jk |
[img]DS11136.jpg[/img][br/]What is the circumference of the circle above with center 0 ?[br/](1)The perimeter of △OXZ is 20 + [math]10sqrt2[/math][br/](2)The length of arc XYZ is 5π. |
90% |
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DS-0f1v4k |
The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998. Was the annual rent collected by the corporation ... |
53% |
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DS-a929xk |
(n-x)+(n-y)+(n-z)+(n-k)[br/]What is the value of the expression above?[br/](1)The average (arithmetic mean) of x, y, z, and k is n.[br/](2)x, y, z, and k are consecutive integers. |
89% |
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DS-e5265k |
If x and y are positive, is [math]x/y[/math] greater than 1 ?[br/](1)xy＞1[br/](2)x-y＞0 |
79% |
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PS-5e2d8k |
Fermat primes are prime numbers that can be written in the form [math]2^k + 1[/math], where k is an integer and a power of 2. Which of the following is NOT a Fermat prime |
93% |
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PS-4d2xtk |
Three pieces of wire have an average (arithmetic mean) length of 39 inches and a median length of 48 inches. What is the maximum possible length, in inches, of the shortest piece of wire? |
88% |
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DS-b827yk |
If Sara's age is exactly twice Bill's age, what is Sara's age?[br/](1)Four years ago, Sara's age was exactly 3 times Bill's age.[br/](2)Eight years from now, Sara's age will be exactly 1.5 times Bi... |
89% |
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PS-f42rbk |
If [math]2^x + 2^x + 2^x + 2^x = 2^n[/math], what is x in terms of n? |
84% |
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PS-28234k |
If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be |
86% |
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PS-fb1yvk |
The age of the Earth is approximately [math]1.3*10^17[/math] seconds, and one year is approximately [math]3.2*10^7[/math] seconds. Which of the following is closest to the age of the Earth in years? |
91% |
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PS-fc2gkk |
A company accountant estimates that airfares next year for business trips of a thousand miles or less will increase by 20 percent and airfares for all other business trips will increase by 10 perce... |
94% |
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DS-351txk |
[img]0132.jpg[/img][br/]Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. W... |
64% |
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DS-a4260k |
What is the value of the two-digit integer x ?[br/](1)The sum of the two digits is 3.[br/](2)x is divisible by 3. |
88% |
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DS-c31ybk |
What is the value of [math]v^3 - k^3[/math]?[br/](1)v k ＞ 0[br/](2)v - k = 6 |
91% |
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DS-5c27ok |
Is |x| =y-z?[br/](1)x+y=z[br/](2)x ＜ 0 |
80% |
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PS-562swk |
Of the mutual funds on a "select list," [math]1/3[/math] have 5-star ratings, and [math]2/5[/math] of the remaining funds have 4-star ratings. If the remaining 300 funds on the list have 3-star ra... |
85% |
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PS-301ywk |
Four staff members at a certain company worked on a project. The amounts of time that the four staff members worked on the project were in the ratio 2 to 3 to 5 to 6. If one of the four staff membe... |
89% |
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DS-f626vk |
[img]DS1176.jpg[/img][br/]The figure above represents a circle graph of Company H's total expenses broken down by the expenses for each of its five divisions. If 0 is the center of the circle and i... |
93% |
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TN模考试题02
