PREP 07 Test 1

GMAT官方免费提供了GMAT模考软件GMATPrep,其界面与真实考试完全相同,但是我们只能做两套模拟题。有前辈发现GMATPrep中事实上内置了一个很大的题库,Prep破解即前辈从GMATPrep中还原出来的完整题库,全部属于真题,且有标准答案,是分项突破时很好的练习材料。 其中第一套共包含PS题目196 题。

题目列表

序号 题目内容
141 If $${5}^{21}{4}^{11}={2}({10})^{n}$$ what is the value of n ?
142 The rate of a certain chemical reaction is directly proportaional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100%, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
143 In a survey of students, each student selected from a list of 12 songs the 2 songs that the student liked best. If each song was selected 4 times, how many students were surveyed?
144 $$If m =\frac{9}{25}, w = \frac{15}{32}$$, and m + w + c = 1, which of the following gives the values of m, w, and c in increasing order?
145 Each of 10 machines works at the same constant rate doing a certain job. The amount of time needed by the 10 machines, working together, to complete the job is 16 hours. How many hours would be needed if only 8 of the machines, working together,were used to complete the job?
146 Machine A, working alone at its constant rate, manufactures 280 bolts per hour, and machine B, working alone at its constant rate, manufactures 220 bolts per hour. How many hours will it take for machines A and B, working together at their respective constant rates,to manufacture 1,000 bolts?
147 A long-distance telephone company charges a monthly fee of $4.95 plus $0.07 per minute for long-distance telephone calls. If a person's long-distance telephone calls for a certain month totaled 320 minutes, what was the total amount that the telephone company charged the person for that month?
148 $$\frac{2^{(4-1)^{2}}}{2^{3-2}}=$$
149 A certain library assesses fines for overdue books as follows. On the first day that a book is overdue, the total fine is $0.10. For each additional day that the book is overdue, the total fine is either increased by $0.30 or doubled, whichever results in the lesser amount. What is the total fine for a book on the fourth day it is overdue?
150 If $${M}={4}^{\frac{1}{2}}+{4}^\frac{1}{3}+{4}^\frac{1}{4}$$, then the value of M is
151 A lawyer charges her clients $200 for the first hour of her time and $150 for each additional hour. If the lawyer charged her new client $1,550 for a certain number of hours of her time, how much was the average (arithmetic mean) charge per hour?
152 Company C has a machine that, working alone at its constant rate, processes 100 units of a certain product in 5 hours. If Company C plans to buy a new machine that will process this product at a constant rate and if the two machines, working together at their respective constant rates, are to process 100 units of this product in 2 hours, what should be the constant rate, in units per hour, of the new machine?
153 A boat traveled upstream a distance of 90 miles at an average speed of (v - 3) miles per hour and then traveled the same distance downstream at an average speed of (v + 3)miles per hour. If the trip upstream took half an hour longer than the trip downstream, how many hours did it take the boat to travel downstream?
154 If n is a positive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n ?
155 If $${2}^{x}-{2}^{x-2}={3}({2}^{13})$$, what is the value of x ?
156 If a, b, c, and d are consecutive even integers and a < b < c < d, then a + b is how much less than c + d ?
157 To furnish a room in a model home, an interior decorator is to select 2 chairs and 2 tables from a collection of chairs and tables in a warehouse that are all different from each other. If there are 5 chairs in the warehouse and if 150 different combinations are possible,how many tables are in the warehouse?
158 The perimeter of a certain isosceles right triangle is 16+16$$\sqrt{2}$$. What is the length of the hypotenuse of the triangle?
159 At a repair shop, the total cost of a repair consists of the charge for parts and a charge of $22.00 per hour for labor. If the total cost of a certain repair at the shop was $249.75 and the charge for parts was $150.75, then the labor charge was for how many hours of labor?
160 Committee X has 4 members, committee Y has 5 members, and these committees have no members in common. If a task force is to be formed consisting of one member of X and one member of Y, how many different task forces are possible?

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