| 题号 |
题目内容 |
平均正确率 |
操作 |
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% |
查看详情
|
DS-452bak |
Are all of the numbers in a certain list of 15 numbers equal?[br/](1)The sum of all the numbers in the list is 60.[br/](2)The sum of any 3 numbers in the list is 12. |
81% |
查看详情
|
PS-342uqk |
[img]20120407195048426_3698.jpg[/img][br/]The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals th... |
83% |
查看详情
|
|
|
DS-1a2ack |
Each week a certain salesman is paid a fixed amount equal to $300, plus a commission equal to 5 percent of the amount of his sales that week over $1,000. What is the total amount the salesman was p... |
81% |
查看详情
|
DS-9f1vrk |
What is the value of [math](3^(-(x + y))) /( 3^(-(x - y)))[/math]?[br/](1)x = 2[br/](2)y = 3 |
76% |
查看详情
|
DS-292bnk |
What is the value of [math](2t+t-x)/(t-x)[/math][br/](1)[math]2t/(t-x)[/math]=3[br/](2)t-x=5 |
87% |
查看详情
|
PS-13353k |
[math]0.99999999/1.0001 - 0.99999991/1.0003=[/math] |
58% |
查看详情
|
DS-562sik |
What is the remainder when the sum of the positive integers x and y is divided by 6?[br/](1) When x is divided by 6, the remainder is 3.[br/](2) When y is divided by 6, the remainder is 1. |
89% |
查看详情
|
DS-452rxk |
How many different factors does the integer n have?[br/](1) [math]n=a^4b^3[/math], where a and b are different positive prime numbers.[br/](2) The only positive prime numbers that are factors of n ... |
67% |
查看详情
|
PS-292gnk |
In a nationwide poll, N people were interviewed.If [math]1/4[/math] of them answered "yes" to question 1, and of those, [math]1/3[/math] answered "yes" to question 2, which ofthe following expressi... |
53% |
查看详情
|
PS-e22kak |
If x is the product of the positive integers from 1 to 8, inclusive, and if i, k, m, and p are positive integers such that x =[math]2^i3^k5^m7^p[/math], then i + k + m + p = |
88% |
查看详情
|
PS-ae2w0k |
Which of the following is closest to [math]10^(180) – 10^(30)[/math] ? |
89% |
查看详情
|
DS-2527dk |
In Jefferson School, 300 students study French or Spanish or both. If 100 of these students do not study French, how many of these students study both French and Spanish?[br/](1)Of the 300 students... |
80% |
查看详情
|
PS-2a2djk |
The temperatures in degrees Celsius recorded at 6 in the morning in various parts of a certain country were 10°, 5°, -2°, -1°, -5°, and 15°. What is the median of these t... |
93% |
查看详情
|
PS-212ihk |
A rectangular circuit board is designed to have width w inches, perimeter p inches, and area k square Inches. Which of the following equations must be true? |
90% |
查看详情
|
PS-b42cyk |
A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold, which of the following expresses this relationship? |
81% |
查看详情
|
PS-ab2dkk |
If[math]y((3x-5)/2)=y[/math] and [math]y!=0[/math],then x= |
91% |
查看详情
|
DS-351y3k |
If a and b are integers, is b even?[br/](1)3a + 4b is even.[br/](2)3a + 5b is even. |
75% |
查看详情
|
DS-8633lk |
The average (arithmetic mean) price of the 3 items that Kate purchased from a clothing store was $50. If there was no sales tax on any item that had a price of less than $80 and 6 percent sales tax... |
85% |
查看详情
|
DS-fa33hk |
If the sequence S has 300 terms, what is the 293rd term of S?[br/](1) The 298th term of S is -616, and each term of S after the first is 2 less than the preceding term.[br/](2) The first term of S ... |
92% |
查看详情
|
DS-cb1uzk |
What is the probability that a student randomly selected from a class of 60 students will be a male who has brown hair?[br/](1)One-half of the students have brown hair.[br/](2)One-third of the stud... |
70% |
查看详情
|
DS-dc1tpk |
Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary’s campaign. If no one donated more than o... |
74% |
查看详情
|
DS-b728wk |
If x, y, and z are positive integers, is x - y odd?[br/](1)x = [math]z^2[/math][br/](2)y = [math](z-1)^2[/math] |
87% |
查看详情
|
PS-6024kk |
[math]C_(m,n) = (m!) / [(m-n)! n!][/math] for nonnegative integers m and n, m ≥ n. If [math]C_(5,3) = C_(5,x)[/math] and x ≠ 3, what is the value of x? |
96% |
查看详情
|
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% |
查看详情
|
PS-d32jgk |
If y is an integer, then the least possible value of |23 - 5y| is |
82% |
查看详情
|
DS-c228qk |
If m ＞ 0 and n ＞ 0, is [math](m+x)/(n+x)＞m/n[/math][br/](1)m＜n[br/](2)x＞0 |
76% |
查看详情
|
DS-db2q3k |
Is the integer n even?[br/](1) n – 5 is an odd integer.[br/](2) n/5 is an even integer.
|
89% |
查看详情
|
DS-bc1wrk |
Is x ＞ k?[br/](1)[math]2^x*2^K=4[/math][br/](2)[math]9^X*3^K=81[/math] |
83% |
查看详情
|
DS-1d28pk |
If x is an integer, is [math]9^x + 9^(-x)[/math] = b ?[br/](1)[math]3^x + 3^(-x) = sqrt(b+2)[/math][br/](2)x ＞ 0 |
88% |
查看详情
|
DS-211vlk |
What is the ratio of the average (arithmetic mean) height of students in class X to the average height of students in class Y?[br/](1)The average height of the students in class X is 120 centimeter... |
75% |
查看详情
|
PS-9a2h9k |
In the formula V =[math]1/((2r)^3)[/math],if r is halved, then V is multiplied by |
77% |
查看详情
|
DS-e91ujk |
Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q?[br/](1)The average annual salary of the employees in Division R is $3... |
90% |
查看详情
|
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% |
查看详情
|
PS-1c36pk |
A researcher computed the mean, the median, and the standard deviation for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change? |
81% |
查看详情
|
PS-c720zk |
A certain machine produces 1,000 units of product P per hour. Working continuously at this constant rate, this machine will produce how many units of product P in 7 days? |
98% |
查看详情
|
PS-8e24mk |
The sum of three integers is 40. The largest integer is 3 times the middle integer, and the smallest integer is 23 less than the largest integer. What is the product of the three integers? |
95% |
查看详情
|
PREP模考试卷04
