PS - printing throughput

If it takes 6 identical printing presses 4 hours to print 5000 newspapers, how long would it take to print 3 of these presses to print 3000 newspapers?

A. 3 hours, 20 minutes
B. 4 hours, 20 minutes
C. 4 hours, 48 minutes
D. 5 hours, 48 minutes
E. 6 hours, 50 minutes

source: www.800score.com

PS - Length of a segment

In the diagram above, BD = 8, AB = 6 and ED=5? What is the length of AE? (Note: figure not drawn to scale.)

A. 3
B. 4
C. 5
D. 7
E. 10

source: www.800score.com

PS - Microchip price

The price of a microchip declines 67 percent every 6 months. At this rate, approximately how many years will it take for the price of an $81 microchip to reach $1 ?

A. 1.5
B. 2
C. 3
D. 13
E. 13.5

source: www.800score.com

EC - Dr Wade's argument

If Dr. Wade was right, any apparent connection of the eating of highly processe foods and excelling at sports is purely coincidental.

A. If Dr. Wade was right, any apparent connection of the eating
B. Should Dr. Wade be right, any apparent connection of eating
C. If Dr. Wade is right, any connection that is apparent between eating of
D. If Dr. Wade is right, any apparent connection between eating
E. Should Dr. Wade have been right, any connection apparent between eating

EC - soviet missiles attack

In the mid-1960's a newly installed radar warning system mistook the rising of the moon as a massive missile attack by the soviets.


A. rising of the moon as a massive missile attack by the soviets
B. rising of the moon for a massive Soviet missile attack
C. moon rising to a massive missile attack by the soviets
D. moon as it was rising for a massive Soviet missile attack
E. rise of the moon as a massive Soviet missile attack

EC - land values increase

Last year, land values in most part of the pinelands rose almost so fast, and in some parts even faster than what they did outside the pinelands.

A. so fast, and in some parts even faster than what they did
B. so fast, and in some parts even faster than, those
C. as fast, and in some parts even faster than, those
D. as fast as, and in some parts even faster than, those
E. as fast as, and in some parts even faster than what they did

PS - Sarah's coins

Sarah receives 10z coins in addition to what she already has. She then has 5y+1 times as many coins as she had originally. In terms of y and z, how many coins did Sarah have originally?

A. 10z(5y + 1)
B. (5y + 1)/10z
C. 2z/y
D. 10/(5y + 1)
E. 10 / (5y + 10)

source: www.800score.com

PS - fish tank

A fish tank is half full of water. If 10 gallons were added, the tank would be 7/8 full. What is the capacity of the tank (in gallons)?

A. 11 3/7
B. 22 3/7
C. 26 2/3
D. 30 3/8
E. 32 1/8


source: http://www.800score.com/gmat/

DS - first order equation

Does 8x = 16 + 2x?

(1) -3x is greater than or equal to -9.
(2) 2x is greater than or equal to 6.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

source: http://www.800score.com/gmat/

PS - perimeter of an equilateral triangle

The figure shows a square inscribed within an equilateral triangle. If the side X of the square measures 12 inches, then what is the perimeter of the equilateral triangle (in inches)?

A. 36
B. 36 x sqrt(3)
C. 36 x sqrt(3) + 24
D. 24 x sqrt(3) + 36
E. 72

-----------------
note: sqrt(x) stands for the square root of x

source: http://www.800score.com/gmat/

DS - prime numbers

What is the value of the integer x?

(1) x is a prime number.
(2) 31 <= x < 37

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - woman's age (sensitive matter)

In what year was Ellen born?

(1) Ellen's brother Pete, who is 1+1/2 years older than Ellen, was born in 1956.
(2) In 1975 Ellen turned 18 years old.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - relative movement of two cars

While on a straight road, car X and car Y are travelling at different constant rates. If car X is now 1 mile ahead car Y, how many minutes from now will car X be 2 miles ahead of car Y?

(1) Car X is travelling at 50 miles per hour and car Y is travelling at 40 miles per hour
(2) 3 minutes ago car X was 1/2 mile ahead of car Y

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - algebraic equation

Is ax = 3- bx?

(1) x(a+b)=3
(2) a=b=1.5 and x=1

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - bookrack capacity

I..........x.........I
-------------------
(consider a bookrack with length x)

Will the first 10 volumes of a 20-volume encyclopedia fit upright in the bookrack?

(1) x = 50 centimeters
(2) Twelve of the volumes have an average (average men) thickness of 5 centimeters,

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - number product

If w+z = 28, what is the value of wz?

(1) w and z are positive integers.
(2) w and z are consecutive odd integers

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - triangle internal angles

(consider a triangle with internal angles x, y and z)

Is the triangle equilateral?

(1) x = y
(2) z=60

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - jar with color marbles

A jar contains 30 marbles, of which 20 are red and 10 are blue. If 9 of the marbles are removed, how many of the marbles left in the jar are red?

(1) Of the marbles removed, the ratio between the number of red ones to the number of blue ones is 2:1.
(2) Of the first 6 marbles removed, 4 are red.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

DS - sweaters shop inventory

Last Friday a shop sold 3/4 of the sweaters in its inventory. Each sweater sold for $20. What was the total revenue last friday from the sale of these sweaters?

(1) When the shop opened last friday, there were 160 sweaters in its inventory.
(2) All but 40 sweaters in the shop's inventory were sold last friday.


A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are suffcient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements (1) and (2) TOGETHER are NOT sufficient.

integer, positive int, negative int, whole numbers definition for GMAT

Integers, Natural Numbers and Whole Numbers

The numbers {... −3, −2, −1, 0, 1, 2, 3, ...} form the set of integers.
The notation { } indicates 'set' or collection, and the three dots indicate that the list continues endlessly to infinity.
The numbers {1, 2, 3, 4, ...} form the set of positive integers (also called natural numbers or counting numbers).
The numbers {−1, −2, −3, ...} form the set of negative integers.
The number 0 is an integer which is neither positive nor negative. It is usually not considered a counting number.
The numbers {0, 1, 2, 3, ...} form the set of whole numbers, i.e. the set of positive integers and zero.