| 题号 |
题目内容 |
平均正确率 |
操作 |
DS-c727qk |
Any decimal that has only a finite number of nonzero digits is a terminating decimal. For example, 24, 0.82, and 5.096 are three terminating decimals. If r and s are positive integers and the ratio... |
76% |
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DS-b227mk |
If n and k are greater than zero, is[math]n/k[/math] an integer[br/](1)n and k are both integers.[br/](2)[math]n^2[/math] and [math]k^2[/math] are both integers. |
94% |
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DS-0f1y4k |
The area of square S is equal to the area of rectangle R. What is the perimeter of square S?[br/](1)The length of one of the sides of rectangle R is twice the length of a side of square S.[br/](2)T... |
70% |
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PS-732c5k |
The ratio 2 to [math]1/3[/math] is equal to the ratio |
97% |
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DS-0327gk |
What is the value of [math]5x^2[/math]+ 4x - 1?[br/](1)x(x+2) = 0[br/](2)x=0 |
92% |
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DS-9037qk |
Last year the average (arithmetic mean) salary of the 10 employees of Company X was $42,800. What is the average salary of the same 10 employees this year?[br/](1) For 8 of the 10 employees, this y... |
71% |
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PS-db2fbk |
In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the aver... |
97% |
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PS-0334sk |
Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3... |
77% |
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DS-e51xxk |
Guy's net income equals his gross income minus his deductions. By what percent did Guy's net income change on January 1, 1989, when both his gross income and his deductions increased?[br/](1)Guy’s ... |
81% |
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PS-3a2h1k |
What is the units digit of [math](13)^4(17)^2(29)^3[/math]? |
81% |
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PS-b32cbk |
A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece? |
97% |
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DS-641vbk |
If x is a positive integer, is the remainder 0 when [math]3^x + 1[/math] is divided by 10?[br/](1)x = 4n + 2, where n is a positive integer.[br/](2)x ＞ 4 |
82% |
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DS-3d1xdk |
Is |x|+|x-1| = 1 ?[br/](1)x≥0[br/](2)x≤1 |
84% |
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DS-de2ulk |
What is the value of [math]a^(-2)b^(-3)[/math] ?
(1) [math]a^(-3)b^(-2) = 36^(-1)[/math]
(2) [math]ab^(-1) = 6^(-1)[/math] |
78% |
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DS-0f283k |
A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragr... |
79% |
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PS-3a20xk |
For any integer k greater than 1, the symbol [math]k^※[/math] denotes the product of all the fractions of the form [math]1/t[/math], where t is an integer between 1 and k, inclusive. What is the va... |
75% |
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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-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% |
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DS-9f1yik |
If [math]xy != 0[/math], is [math]x/y = 1[/math]?[br/](1)[math]x^2 = y^2[/math][br/](2)xy＞0 |
90% |
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DS-091wok |
If x, y,and z are positive integers, is xz even?[br/](1)xy is even.[br/](2)yz is even. |
87% |
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PS-6c2rfk |
A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. If each dessert platter contains an equal number of kinds of cheese and kinds of fruit, how many differen... |
79% |
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PS-342e7k |
In a certain furniture store, each week Nancy earns a salary of $240 plus 5 percent of the amount of her total sales that exceeds $800 for the week. If Nancy earned a total of $450 one week, what w... |
86% |
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PS-a431ik |
For each hour of production, a certain factory requires 1 assembly line worker for every 25 units to be produced in that hour. The factory also requires 12 managers regardless of the number of unit... |
94% |
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DS-9f31lk |
What is the retail price of a certain calculator?[br/](1)The retail price of the calculator is $2.00 more than the wholesale price.[br/](2)The retail price of the calculator is 50 percent more than... |
93% |
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PS-842e2k |
Machine A produces 100 parts twice as fast as Machine B does. Machine B produces 100 parts in 40 minutes. If each machine produces parts at a constant rate, how many parts does Machine A produce in... |
94% |
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DS-d11xsk |
What is the value of [math]x^2[/math] ?[br/](1)[math]5 ＜ x^2 ＜ 10[/math][br/](2)x is an integer. |
89% |
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PS-ab2dkk |
If[math]y((3x-5)/2)=y[/math] and [math]y!=0[/math],then x= |
91% |
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DS-0330uk |
Is x less than 20 ?[br/](1)The sum of x and y is less than 20.[br/](2)y is less than 20.
|
91% |
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PS-182i5k |
In a certain game, a large container is filled with red, yellow, green, and blue beads worth, respectively, 7, 5, 3, and 2 points each. A number of beads are then removed from the container. If the... |
80% |
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DS-a327rk |
[img]DS11108.jpg[/img][br/]In the figure above, what is the value of x + y ?[br/](1)x = 70[br/](2)△ABC and △ADC are both isosceles triangles. |
77% |
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PS-4a22sk |
A photographer will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second ro... |
61% |
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DS-dc2pjk |
If n is an integer and [math]x^n–x^(-n)=0[/math], what is the value of x ?[br/](1) x is an integer.[br/](2) n ≠ 0
|
56% |
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DS-031tqk |
If x and y are positive, is [math]x^3 ＞ y[/math]?[br/](1)[math]sqrt x ＞ y[/math][br/](2)x ＞ y |
69% |
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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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PS-0b2e0k |
A dealer originally bought 100 identical batteries at a total cost of q dollars. If each battery was sold at 50 percent above the original cost per battery, then, in terms of q, for how many dollar... |
79% |
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PS-192fhk |
At a loading dock, each worker on the night crew loaded [math]3/4[/math] as many boxes as each worker on the day crew. If the night crew has [math]4/5[/math] as many workers as the day crew, what f... |
67% |
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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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PREP模考试卷07
