GMAT Prep Quiz 2 2x
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Thorough review is critical to the learning process and for most people should take a significant amount of time (and effort!) potentially equally or surpassing the amount of time taken to do the question set.
- Redo questions that you got wrong or struggled on without looking at the answers or explanations. Think. Rethink. Push yourself. Put pen to paper. Don’t review with only your eyes!
- Once you’ve solved or if you aren’t able to solve in about 10 minutes carefully review the explanation (if provided). Again, put pen to paper and redo the question along with the explanation.
- If we haven’t provided an explanation or if our explanation didn’t clear up your doubts google the first few words of the question and confirm the solution on the GMAT forums.
- Except for CR and RC, take a screenshot and add it to your dropbox review folder so you can easily revisit the question when assigned review in your HW schedule.
- Bring questions that you still find difficult to QA or to our sessions. For sessions add the screenshots to the “review in session” folder in your dropbox.
Here’s a video outlining the review process: https://www.youtube.com/edit?o=U&video_id=X6k3niNoGuA
Question 1 of 20
Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute, and gear Q makes 40 revolutions per minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revolutions than gear P ?CorrectIncorrect
Question 2 of 20
The cost of a square slab is proportional to its thickness and also proportional to the square of its length. What is the cost of a square slab that is 3 meters long and 0.1 meter thick?
(1) The cost of a square slab that is 2 meters long and 0.2 meter thick is $160 more than the cost of a square slab that is 2 meters long and 0.1 meter thick.
(2) The cost of a square slab that is 3 meters long and 0.1 meter thick is $200 more than the cost of a square slab that is 2 meters long and .1 meter thick.CorrectIncorrect
Question 3 of 20
A committee of three people is to be chosen from four married couples. What is the number of different committees that can be chosen if two people who are married to each other cannot both serve on the committee?CorrectIncorrect
Question 4 of 20
If n is a positive integer and r is the remainder when (n – 1)(n + 1) is divided by 24, what is the value of r ?
(1) n is not divisible by 2.
(2) n is not divisible by 3.CorrectIncorrect
Question 5 of 20
The cost of delivery for an order of desk chairs was $10.00 for the first chair, and $1.00 for each additional chair in the order. If an office manager placed an order for n desk chairs, is n > 24?
(1) The delivery cost for the order totaled more than $30.00.
(2) The average (arithmetic mean) delivery cost per chair of the n chairs was $1.36.CorrectIncorrect
Question 6 of 20
In the graduating class of a certain college, 48 percent of the students are male and 52 percent are female. In this class 40 percent of the male and 20 percent of the female students are 25 years old or older. If one student in the graduating class is randomly selected, approximately what is the probability that he or she will be less than 25 years old?CorrectIncorrect
Question 7 of 20
Alice’s take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month. The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save. If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?CorrectIncorrect
Question 8 of 20
For which of the following functions is f(a + b) = f(a) + f(b) for all positive numbers a and b?CorrectIncorrect
Question 9 of 20
Of the 60 animals on a certain farm, 2/3 are either pigs or cows. How many of the animals are cows?
(1) The farm has more than twice as many cows as it has pigs.
(2) The farm has more than 12 pigs.CorrectIncorrect
Question 10 of 20
If in a certain population, people are born at an average rate of 9 people every 2 seconds and people die at an average rate of 3 people every 2 seconds, by approximately how many people does the population increase in 1 day?CorrectIncorrect
Question 11 of 20
What was the percent increase in the population of City K from 1980 to 1990 ?
(1) In 1970 the population of City K was 160,000
(2) In 1980 the population of City K was 20 percent greater than it was in 1970, and in 1990 the population of City K was 30 percent greater than it was in 1970.CorrectIncorrect
Question 12 of 20
Ann deposited money into two new accounts, A and B. Account A earns 5 percent simple annual interest and account B earns 8 percent simple annual interest. If there were no other transactions in the two accounts, then the amount of interest that account B earned in the first year was how many dollars greater than the amount of interest that account A earned in the first year?
(1) Ann deposited $200 more in account B than in account A.
(2) The total amount of interest that the two accounts earned in the first year was $120.CorrectIncorrect
Question 13 of 20
In the xy-plane, at what two points does the graph of y = (x + a)(x + b) intersect the x-axis?
(1) a + b = -1
(2) The graph intersects the y-axis at (0, -6).CorrectIncorrect
Question 14 of 20
The number 75 can be written as the sum of the squares of 3 different positive integers. What is the sum of these 3 integers?CorrectIncorrect
Question 15 of 20
The number of stamps that Kaye and Alberto had were in the ratio 5 : 3, respectively. After Kaye gave Alberto 10 of her stamps, the ratio of the number Kaye had to the number Alberto had was 7 : 5. As a result of this gift, Kaye had how many more stamps than Alberto?CorrectIncorrect
Question 16 of 20
A set of 15 different integers has a median of 25 and a range of 25. What is the greatest possible integer that could be in this set?CorrectIncorrect
Question 17 of 20
For the students in class A, the range of their heights is r centimeters and the greatest height is g centimeters. For the students in class B, the range of their heights is s centimeters and the greatest height is h centimeters. Is the least height of the students in class A greater than the least height of the students in class B ?
(1) r < s
(2) g > hCorrectIncorrect
Question 18 of 20
If r and s are positive integers, is r/s an integer?
(1) Every factor of s is also a factor of r.
(2) Every prime factor of s is also a prime factor of r.CorrectIncorrect
Question 19 of 20
\( If p and n are positive integers and p > n, what is the remainder when $p^2 – n^2\) is divided by 15 ?
(1) The remainder when p + n is divided by 5 is 1.
(2) The remainder when p – n is divided by 3 is 1.CorrectIncorrect
Question 20 of 20
When 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever?
(1) 880 children developed neither inflammation nor fever.
(2) 20 children developed fever.CorrectIncorrect