Monday, June 17, 2013

Quantitative Reasoning



GRADUATE RECORD EXAMINATIONS®




Practice General Test #1
Section 3: Quantitative Reasoning
Section 4: Quantitative Reasoning









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Revised Graduate Record Examinations®  General Test

Practice Test Number 1


Instructions for the Verbal Reasoning and Quantitative Reasoning Sections

Information for screen reader users:

This document has been created to be accessible to individuals who use screen readers. You may wish to consult the manual or help system for your screen reader to learn how best to take advantage of the features implemented in this document. Please consult the separate document, GRE Screen Reader Instructions.doc, for important details.

This practice test includes content that some users may wish to skip. For example, some questions require you to complete sentences or longer texts from among several choices. For those questions where it might be helpful to hear the available choices in context, text of the choices in context is included. However, some users may wish to skip this material. Similarly, some questions include detailed figure descriptions that some users may wish to skip because they can get the required information from the accompanying tactile or large print figures. In each case, material that may be skipped is delineated by statements like “Begin skippable content” and “End skippable content” each in the Heading 6 style.


As a reminder, standard timing for each section of the test is provided in the table below:

Section Name
Standard Time
Analytical Writing 1
Analyze an Issue
30 minutes
Analytical Writing 2
Analyze an Argument
30 minutes
1
Verbal Reasoning
35 minutes
2
Verbal Reasoning
35 minutes
3
Quantitative Reasoning
40 minutes
4
Quantitative Reasoning
40 minutes

The Quantitative sections include figures and their descriptions.  In addition, separate figure supplements, in large print (18 points) and raised-line formats, are available. The large print figure supplement may be downloaded from http://www.ets.org/gre/disabilities. To obtain the raised-line figure supplement or if you have difficulty locating the large print figure supplement on the GRE®  web site, contact E T S Disability Services Monday-Friday 8:30 a.m. to 5 p.m. New York time, 1-609-771-7780, 1-866-387-8602 (toll free for test takers in the United States, U.S. Territories, and Canada). E-mail: stassd@ets.org.

Important Notes

In the actual test, your scores for the multiple-choice sections will be determined by the number of questions you answer correctly. Nothing is subtracted from a score if you answer a question incorrectly. Therefore, to maximize your scores it is better for you to guess at an answer than not to respond at all. Work as rapidly as you can without losing accuracy. Do not spend too much time on questions that are too difficult for you. Go on to the other questions and come back to the difficult ones later.

Some or all of the passages in this test have been adapted from published material to provide the examinee with significant problems for analysis and evaluation. To make the passages suitable for testing purposes, the style, content, or point of view of the original may have been altered. The ideas contained in the passages do not necessarily represent the opinions of the Graduate Record Examinations Board or Educational Testing Service.

You may use a calculator in the Quantitative Reasoning sections only. You will be provided with a basic calculator and cannot use any other calculator, except as an approved accommodation.

Marking Your Answers

In the actual test, all answers must be entered in the test book (or in the supervisor’s copy of the test book if you are not using a print format test). If answers are being recorded in a large print test book, the directions for marking answers are slightly different because answers entered in large print test books are not machine-scored.
If your answers are being entered in a large print test book, make sure your marks are clear and unambiguous. Additional instructions for marking answers in large print test books are provided with the large print practice tests.

The following instructions describe how answers must be filled in if using a regular print test book, whether you are entering your own answers or a scribe is entering them at your direction.

Be sure that each mark is dark and completely fills the circle.  

Any stray marks that lie in or near a circle must be erased carefully. If you change an answer, be sure that all previous marks are erased completely. Stray marks and incomplete erasures may be read as intended answers. You may work out your answers in the blank areas of the test book, but do not work out answers near the circles. Scratch paper will not be provided, except as an approved accommodation.

Question Formats

This practice test may include questions that would not be used in an actual test administered in an alternate format because they have been determined to be less suitable for presentation in such formats.

The questions in these sections have several different formats. A brief description of these formats and instructions for entering your answer choices are given below.
Multiple-Choice Questions—Select One Answer Choice
These standard multiple-choice questions require you to select just one answer choice from a list of options. You will receive credit only if you mark the single correct answer choice and no other.

Example:
What city is the capital of France?
A.        Rome
B.        Paris              
C.        London
D.        Cairo

In this example, B, Paris, should be marked.
Multiple-Choice Questions—Select One or More Answer Choices
Some of these questions specify how many answer choices you must select; others require you to select all that apply. In either case, to receive credit all of the correct answer choices must be marked. In printed versions of the test, these questions are distinguished by the use of a square box to select an answer choice.

Example:
Select all that apply.

Which of the following countries are in Africa?
A.        China             
B.        Congo            
C.        France
D.        Kenya
                       
In this example, B and D (Congo and Kenya) should be marked.
Column Format Questions
This question type presents the answer choices in groups (presented as columns in the printed version of the test). You must pick one answer choice from each group. You will receive credit only if you mark the correct answer choice in each group. In the following example, there is a sentence with two blanks, each indicating that something has been omitted. For each question of this type, first you will hear the text with the word “BLANK” in place of the omitted material. Next, you will hear the text again, but in place of each blank, you will hear three lettered options for filling that blank. The set of lettered options is formatted as bold and enclosed in parentheses. Each option consists of a word or phrase.

For questions containing one or two blanks, following the list of answer choices are up to nine readings of the text, one for each answer choice combination. The group of readings begins with a “Begin Skippable Content” level-6 heading and ends with an “End Skippable Content” level-6 heading. Each reading consists of the option letter or letters, the words or phrases being combined, and the text with the combination of the words or phrases inserted into the blanks.

For questions containing three blanks, the choices will not be read in context because it has been determined that replaying the question for all possible combinations of answer choices is not a useful way to present these questions.

Example:
This question has two blanks.

Complete the following sentence.
BLANK is the capital of BLANK.

Now listen to the text with the three options inserted in place of each blank.

(A. Paris, B. Rome, C. Cairo) is the capital of (D. Canada, E. France, F. China).

Indicate your two answer choices and skip hearing the answer choices in context or go on to hear them in context before indicating your answer choices. Fill all blanks in the way that best completes the text.
Begin skippable content.
Answer Choices in Context:
A, D. Paris, Canada. Paris is the capital of Canada.
A, E. Paris, France. Paris is the capital of France.
A, F. Paris, China. Paris is the capital of China.
B, D. Rome, Canada. Rome is the capital of Canada.
B, E. Rome, France. Rome is the capital of France.
B, F. Rome, China. Rome is the capital of China.
C, D. Cairo, Canada. Cairo is the capital of Canada.
C, E. Cairo, France. Cairo is the capital of France.
C, F. Cairo, China. Cairo is the capital of China.
End skippable content.

Indicate your two answer choices. Fill all blanks in the way that best completes the text.

In this example, choice A, Paris (from the group A, B, C), and E, France (from the group D, E, F), should be indicated as the answer.
Numeric Entry Questions
These questions require a number to be entered by marking entries in a grid according to the following instructions.

Your answer may be an integer, a decimal, or a fraction, and it may be negative.
Equivalent forms of the correct answer, such as 2.5 and 2.50, are all correct. Although fractions do not need to be reduced to lowest terms, they may need to be reduced to fit in the grid.
Enter the exact answer unless the question asks you to round your answer.
If a question asks for a fraction, the grid will have a built-in division slash. Otherwise, the grid will have a decimal point.

The instructions for marking the entries will depend on whether a regular print or a large print test is being used to record your answers. If your answers are being entered into a regular print edition of the test, the following instructions apply:

Start your answer in any column, space permitting. Fill in no more than one entry in any column of the grid. Columns not needed should be left blank.
Write your answer in the boxes at the top of the grid and fill in the corresponding circles. You will receive credit only if your grid entries are clearly marked, regardless of the number written in the boxes at the top.

If your answers are being entered into a large print edition of the test, instead of filling in circles on the grid in steps 5 and 6, you will be asked to circle those entries.

Section 3 follows. In an actual test, testing time will resume when you begin the section 3

Revised G R E Practice Test Number 1.

Section 3. Quantitative Reasoning.

25 Questions.

Information for screen reader users:

This document has been created to be accessible to individuals who use screen readers. You may wish to consult the manual or help system for your screen reader to learn how best to take advantage of the features implemented in this document. Please consult the separate document, GRE Screen Reader Instructions.doc, for important details.

Section Directions

For each question, indicate the best answer, using the directions given.
Notes: All numbers used are real numbers.
All figures are assumed to lie in a plane unless otherwise indicated.
Geometric figures, such as lines, circles, triangles, and quadrilaterals, are not necessarily drawn to scale. That is, you should not assume that quantities such as lengths and angle measures are as they appear in a figure. You should assume, however, that lines shown as straight are actually straight, points on a line are in the order shown, and more generally, all geometric objects are in the relative positions shown. For questions with geometric figures, you should base your answers on geometric reasoning, not on estimating or comparing quantities from how they are drawn in the geometric figure.
Coordinate systems, such as x y planes and number lines, are drawn to scale; therefore, you can read, estimate, or compare quantities in such figures from how they are drawn in the coordinate system.
Graphical data presentations, such as bar graphs, circle graphs, and line graphs, are drawn to scale; therefore, you can read, estimate, or compare data values from how they are drawn in the graphical data presentation.

For each of Questions 1 through 9, compare Quantity A and Quantity B, using the additional information given, if any. Select one of the following four answer choices. A symbol that appears more than once in a question has the same meaning throughout the question.

B         Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
Example 1:
Quantity A:   2 times 6
Quantity B:    2 + 6
Solution: Quantity A is equal to 12 and Quantity B is equal to 8, so the correct answer for Example 1 is answer choice A, Quantity A is greater.
Example 2:
Refer to the figure.
Figure for Example 2
Begin skippable figure description.
The figure shows triangle PQR, where P is the leftmost vertex of the horizontal base PR and vertex Q is above PR. Point S lies on horizontal base PR and appears to be the midpoint of PR. Line segment QS is drawn from vertex Q to point S. The lengths of PS and SR appear to be equal.
End skippable figure description.
Quantity A:   PS
Quantity B:    SR
Solution: The correct answer for Example 2 is answer choice D. The relationship between PS and SR cannot be determined from the information given since equal measures cannot be assumed, even though PS and SR appear to be equal in the figure.
Question 1.
Refer to the figure.
Figure for Question 1

Begin skippable figure description.
The figure shows two right triangles. One of the triangles has a leg of length 4 and a leg of length x, and a hypotenuse of length 8. The other triangle has two legs, each of which is of length 4, and a hypotenuse of length y.
End skippable figure description.
Quantity A:   x
Quantity B:    y
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 2.
It is given that
open parenthesis, x minus 2y, close parenthesis, times open parenthesis, x + 2y, close parenthesis, = 4

Quantity A:   x squared, minus, 4 times the quantity y squared
Quantity B:    8
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 3.
A certain recipe requires  three halves cups of sugar and makes 2 dozen cookies.
(1 dozen = 12)
Quantity A:   The amount of sugar required for the same recipe to make 30 cookies
Quantity B:    2 cups
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 4.
A power station is located on the boundary of a square region that measures 10 miles on each side. Three substations are located inside the square region.
Quantity A:   The sum of the distances from the power station to each of the substations
Quantity B:    30 miles
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 5.
It is given that
 6 is less than x, which is less than 7,
 and
y = 8
Quantity A:   the fraction x over y
Quantity B:    0.85
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 6.
Refer to the figure.
Figure for Question 6
Begin skippable figure description.
The figure accompanying this question consists of a circle and triangle B O A, where O is the center of the circle and A and B are points that lie on the circle. In the triangle, the measure of angle B O A is 60 degrees.
End skippable figure description.
It is given that O is the center of the circle and the perimeter of triangle B O A is 6.
Quantity A:   The circumference of the circle
Quantity B:    12
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 7.
Quantity A:   The standard deviation of a set of 5 different integers, each of which is between 0 and 10
Quantity B:    The standard deviation of a set of 5 different integers, each of which is between 10 and 20
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.

Question 8.
It is given that x is greater than 1.
Quantity A:   x times, the fourth power of, open parenthesis, x squared, close parenthesis
Quantity B:    open parenthesis, x cubed, close parenthesis, to the third power
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.
Question 9.
It is given that x is not equal to 0.
Quantity A:   the absolute value of x + the absolute value of negative 2
Quantity B:    the absolute value of the quantity x minus 2
A.        Quantity A is greater.
B.        Quantity B is greater.
C.        The two quantities are equal.
D.        The relationship cannot be determined from the information given.
From the answer choices given, select and indicate the one that describes the relationship between quantity A and quantity B.

Questions 10 through 25 have several different answer formats, including both selecting answers from a list of answer choices and numeric entry. With each question, answer format instructions will be given.

Numeric Entry Questions

These questions require a number to be entered by marking entries in a grid according to the following instructions
Your answer may be an integer, a decimal, or a fraction, and it may be negative.
Equivalent forms of the correct answer, such as 2.5 and 2.50, are all correct. Although fractions do not need to be reduced to lowest terms, they may need to be reduced to fit in the grid.
Enter the exact answer unless the question asks you to round your answer.
If a question asks for a fraction, the grid will have a built-in division slash. Otherwise, the grid will have a decimal point.

The instructions for marking the entries will depend on whether a regular print or a large print test is being used to record your answers. If your answers are being entered into a regular print edition of the test, the following instructions apply:
Start your answer in any column, space permitting. Fill in no more than one entry in any column of the grid. Columns not needed should be left blank.
Write your answer in the boxes at the top of the grid and fill in the corresponding circles. You will receive credit only if your grid entries are clearly marked, regardless of the number written in the boxes at the top.

If your answers are being entered into a large print edition of the test, instead of filling in circles on the grid in steps 5 and 6, you will be asked to circle those entries.
Question 10.
This question has five answer choices, labeled A through E. Select the best one of the answer choices given.
The system of equations
7x + 3y = 12, and
3x + 7y = 6
is given.
If x and y satisfy the system of equations given, what is the value of  x minus y?
A.        two thirds
B.        three halves
C.        1
D.        4
E.         6
Select and indicate the best one of the answer choices given.
Question 11.
This question has five answer choices, labeled A through E. Select all the answer choices that apply.
In triangle ABC, the measure of angle A is 25° and the measure of angle B is greater than 90°. Which of the following could be the measure of angle C?
Indicate all such measures.
A.        12°
B.        15°
C.        45°
D.        50°
E.         70°
Select and indicate all the answer choices that apply. The correct answer to a question of this type could consist of as few as one, or as many as all five of the answer choices.
Question 12.
This question has five answer choices, labeled A through E. Select the best one of the answer choices given.
What is the least integer n such that  the fraction with numerator 1, and denominator 2 to the power n is less than 0.001 ?
A.        10
B.        11
C.        500
D.        501
E.         There is no such least integer.
 Select and indicate the best one of the answer choices given.
Question 13.
This question has five answer choices, labeled A through E. Select the best one of the answer choices given.
In the sunshine, an upright pole 12 feet tall is casting a shadow 8 feet long. At the same time, a nearby upright pole is casting a shadow 10 feet long. If the lengths of the shadows are proportional to the heights of the poles, what is the height, in feet, of the taller pole?
A.        10
B.        12
C.        14
D.        15
E.         18
Select and indicate the best one of the answer choices given.
Question 14.
This question has five answer choices, labeled A through E. Select the best one of the answer choices given.
If k is the smallest prime number greater than 21 and b is the largest prime number less than 16, then kb =
A.        299
B.        323
C.        330
D.        345
E.         351
Select and indicate the best one of the answer choices given.
Question 15.
This question does not have any answer choices; it is a numeric entry question.
To answer this question, enter a number in the answer space provided. The number entered cannot be a fraction.
The total amount of Judy’s water bill for the last quarter of the year was $40.50. The bill consisted of a fixed charge of $13.50 plus a charge of $0.0075 per gallon for the water used in the quarter. For how many gallons of water was Judy charged for the quarter?
To answer this question, enter a number in the answer space provided. The number can include a decimal point, and can be positive, negative, or 0.  The number entered cannot be a fraction.
Question 16.
This question has five answer choices, labeled A through E. Select the best one of the answer choices given.
List R: 28, 23, 30, 25, 27
List S: 22, 19, 15, 17, 20
The median of the numbers in list R is how much greater than the median of the numbers in list S?
A.        8
B.        10
C.        12
D.        13
E.         15
Select and indicate the best one of the answer choices given.

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