GMAT Critical Reasoning Discussions

Another one

The U.S. census is not perfect: thousands of Americans probably go uncounted. However, the basic statistical portrait of the nation painted by the census is accurate. Certainly

some of the poor go uncounted, particularly the homeless; but some of the rich go uncounted as well, because they are often abroad or traveling between one residence and

another.
Which of the following is an assumption on which the argument above depends?
(A) Both the rich and the poor have personal and economic reasons to avoid being counted by the census.
(B) All Americans may reasonably be classified as either poor or rich.
(C) The percentage of poor Americans uncounted by the census is close to the percentage of rich Americans uncounted.
(D) The number of homeless Americans is approximately equal to the number of rich Americans.
(E) The primary purpose of the census is to analyze the economic status of the American population.

cognizant_81 Says
my take is in bold!!


but where does the passage say about the quality of the companies .. it just says that the companies have grown huge. Besides, it is not the right answer or atleast this is what the post says. I found this question in this same thread.

I thought D was the right answer, because D is the only one which talks about huge corporations. Again I know the later half of D does not have support in the passage.

But the other choices have terms that again are not justified. A talks about older managers, B talks about 2 decades, C about consistent track record and E about recent innovations

Please show me the logic to select the right answer in such a case

I think the answer is B.

n 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.

my take :
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.

A study followed a group of teenagers who had never smoked and tracked whether they took up smoking and how their mental health changed. After one year, the incidence of depression among those who had taken up smoking was four times as high as it was among those who had not. Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood, it is likely that smoking contributes to depression in teenagers.

Which of the following, if true, most strengthens the argument?


B. The study did not distinguish between participants who smoked only occasionally and those who were heavy smokers.
OA is in bold!!


I know there is no point arguing with you but THIS ANSWER IS INCORRECT.


ANSWER SHOULD BE A

This is a question about cause and effect. The question suggests that smoking is the main cause of depression. To strengthen this we need to ELIMINATE the possibility of an alternate cause for the effect.

option A says- "Participants who were depressed at the start of the study were no more likely to be smokers after one year than those who were not depressed"

i.e. the reverse possibility is 'depression caused them to start smoking'

A eliminates this possibility.
A study followed a group of teenagers who had never smoked and tracked whether they took up smoking and how their mental health changed. After one year, the incidence of depression among those who had taken up smoking was four times as high as it was among those who had not. Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood, it is likely that smoking contributes to depression in teenagers.

Which of the following, if true, most strengthens the argument?


B. The study did not distinguish between participants who smoked only occasionally and those who were heavy smokers.
OA is in bold!!



I know there is no point arguing with you but THIS ANSWER IS INCORRECT.

ANSWER SHOULD BE A

This is a question about cause and effect. The question suggests that smoking is the main cause of depression. To strengthen this we need to ELIMINATE the possibility of an alternate cause for the effect.


The correct answer is A, and this is a GMATPrep question, so no arguments on the source and OA.

@Saketh: Your reasoning is spot-on.

It is indeed a cause and effect question, to infer that X causes Y, we need to be sure that Y was not the cause of X.

In this specific case, to conclude that Smoking(X) causes depression(Y), we need to be sure that it was not depression(Y) that caused smoking(X).
n 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.


I will go with option B

-Deepak.
I have a few more. I want to understand the justifications because I have strong reasons to reject the choices given as answers

Below is an excerpt from a letter that was sent by the chairman of a corporation to the stockholders.
A number of charges have been raised against me, some serious, some trivial. Individuals seeking to control the corporation for their own purposes have demanded my resignation.

Remember that no court of law in any state has found me guilty of any criminal offense whatsoever. In the American tradition, as you know, an individual is considered innocent until proven guilty. Furthermore, as the corporations unbroken six-year record of growth will show, my conduct of my official duties as chairman has only helped enhance the success of the corporation, and so benefited every stockholder.

Which of the following can be properly inferred from the excerpt?

(A) The chairman believes that all those who have demanded his resignation are motivated by desire to control the corporation for their own purposes.
(B) Any misdeeds that the chairman may have committed were motivated by his desire to enhance the success of the corporation.
(C) The chairman is innocent of any criminal offense.
(D) The corporation has expanded steadily over the past six years.
(E) Any legal proceedings against the chairman have resulted in his acquittal.


Hey Vishal - can you please let us know what option did you choose?

This is a inference question so we can directly eliminate option A because it simply re-iterates the data given in the question. To infer means to find a logical conclusion.

Option D is also incorrect because of the same reason.

Option C is too extreme as a choice. we cannot say that chairman is innocent.

Option E may or may not be true. Chairman says he cannot be proved guilty unless proved otherwise.

The key is to look at this setence -
my conduct of my official duties as chairman has only helped enhance the success

This means that Chairman strongly believes that whatever he has done was driven by his motive to enhance the success of the company. those activities can be anything - bribe, forgeing the account etc.. although his activities might have benifited the company but those activities are downright ILLEGAL. -

Hence option B is the correct answer.
The below question has been discussed in this forum before but I was not convinced with the explanation. Please help
You won't find many big companies on the "fastest growing" list. That's not surprising - the unwritten law says that all companies slow down as they get big. But you can still drive pockets of outrageous growth at your old-line company. In his new book, Hamel shows how the best companies transform themselves into "gray-haired revolutionaries".
For a company to qualify for the title suggested by the author, which of the following would need to be true?
(A) The company tends to have older managers in the higher echelons of the company.
(B)The company has, over the last two decades acquired numerous patents.
(C) The company has a consistent track record of being able to deliver quality even in the face of stringent difficulty.
(D) The company is a huge corporation that owes its decades of success to its founder who was a revolutionary thinker.
(E) The company deals in products that are always susceptible to being outclassed by recent innovations.

but where does the passage say about the quality of the companies .. it just says that the companies have grown huge. Besides, it is not the right answer or atleast this is what the post says. I found this question in this same thread.

I thought D was the right answer, because D is the only one which talks about huge corporations. Again I know the later half of D does not have support in the passage.

But the other choices have terms that again are not justified. A talks about older managers, B talks about 2 decades, C about consistent track record and E about recent innovations

Please show me the logic to select the right answer in such a case


This is a horrible question !
I would like to know its source before other puys waste their time on this one.

The options are nowhere near the stimulus, do not waste your time on such questions.

I will post an excerpt from the interview of the author of the book, Hamel, and it can be clearly understood that the authors intent has not been backed by the options provided in this question.

Q: Who are the "gray-haired revolutionaries"?
A: These are companies that have managed to reinvent themselves and their industries more than once. Their gray hair comes not from years, but from the experience of having lived through several strategy "lifetimes." While no company has totally cracked the code of the new innovation agenda, we can learn a lot from those who've made a start. Enron has been named America's most innovative company five years running. Cisco has transformed itself continuously in the lightening fast world of the Internet, going from a one-product company to a data communications kingpin. And no one in the brokerage industry would doubt Charles Schwab's capacity for radical reinvention.

Source: Leading the Revolution - HBS Working Knowledge
Another one

The U.S. census is not perfect: thousands of Americans probably go uncounted. However, the basic statistical portrait of the nation painted by the census is accurate. Certainly

some of the poor go uncounted, particularly the homeless; but some of the rich go uncounted as well, because they are often abroad or traveling between one residence and

another.
Which of the following is an assumption on which the argument above depends?
(A) Both the rich and the poor have personal and economic reasons to avoid being counted by the census.
(B) All Americans may reasonably be classified as either poor or rich.
(C) The percentage of poor Americans uncounted by the census is close to the percentage of rich Americans uncounted.
(D) The number of homeless Americans is approximately equal to the number of rich Americans.
(E) The primary purpose of the census is to analyze the economic status of the American population.


I think this one is bit tricky - option C and option D are very close-- but we are not looking to compare homeless americans with rich americans. I will choose C.

let me know if you need any specific info about this question to clear your doubt.
This is a horrible question !
I would like to know its source before other puys waste their time on this one.

1)You won't find many big companies on the "fastest growing" list. That's not surprising - the unwritten law says that all companies slow down as they get big. But you can still drive pockets of outrageous growth at your old-line company. In his new book, Hamel shows how the best companies transform themselves into "gray-haired revolutionaries".
For a company to qualify for the title suggested by the author, which of the following would need to be true?

(A) The company tends to have older managers in the higher echelons of the company.
(B)The company has, over the last two decades acquired numerous patents.
(C) The company has a consistent track record of being able to deliver quality even in the face of stringent difficulty.
(D)
The company is a huge corporation that owes its decades of success to its founder who was a revolutionary thinker.
(E)
The company deals in products that are always susceptible to being outclassed by recent innovations.


Hi Sausi007,
I am quoting the source of this question. This question was post #96, page #10 in this thread
Hi Sausi007,
I am quoting the source of this question. This question was post #96, page #10 in this thread


hey vishal - source means from where did you get this question?

Manhattan, Kaplan, Vertias or the ugly and bad 1000 CR etc?
Hey Vishal - can you please let us know what option did you choose?

This is a inference question so we can directly eliminate option A because it simply re-iterates the data given in the question. To infer means to find a logical conclusion.

Option D is also incorrect because of the same reason.

Option C is too extreme as a choice. we cannot say that chairman is innocent.

Option E may or may not be true. Chairman says he cannot be proved guilty unless proved otherwise.

The key is to look at this setence -
my conduct of my official duties as chairman has only helped enhance the success

This means that Chairman strongly believes that whatever he has done was driven by his motive to enhance the success of the company. those activities can be anything - bribe, forgeing the account etc.. although his activities might have benifited the company but those activities are downright ILLEGAL. -

Hence option B is the correct answer.


Hi Saket,
After reading your justification, I believe that B should be the right answer. However I have the following doubts
Consider a case where the manager was charged by a criminal offense purely personal in nature. There is nothing in the passage that can stop you from considering this case. If this happens, then people can demand his resignation. Again in such a case we will not be in a position to assume that his motivation of the crimes was the success of the corporation

Doubt number 2: This question asks us to draw inference. I thought only assumption questions are the ones which cannot have a part of the passage as an answer because then the answer will not be an assumption.
But this is where we are asked to draw an inference.Why cant it be a part of the passage.

I rejected B because of the stupid justification I just gave :D
Rejected C because the passage says that he has not been proven guilty but doesnot claim his innocence. There can be cases where he is still under trial
Rejected D because I couldn't justify STEADY growth. The passage talks about growth but not a steady one
Rejected E because of the same reason I rejected C

So my ans was A

The source is post #103 in this thread. Answers are in #110. Both on poge 10
hey vishal - source means from where did you get this question?

Manhattan, Kaplan, Vertias or the ugly and bad 1000 CR etc?


Hi Saket,

I am going through this thread from page one. I didn't pick it up from any of the books.

I am posting the questions for which I didnt get a good justification and the ones which I couldnt answer
I think this one is bit tricky - option C and option D are very close-- but we are not looking to compare homeless americans with rich americans. I will choose C.

let me know if you need any specific info about this question to clear your doubt.


Ohh .. this one is easy .. I wonder why I posted this. May be one of the side effects of solving CR during late night hours 😁
There is relatively little room for growth in the overall carpet market, which is tied to the size of the population. Most who purchase carpet do so only once or twice, first in their twenties or thirties, and then perhaps again in their fifties or sixties. Thus as the population ages, companies producing carpet will be able to gain market share in the carpet market only through purchasing competitors, and not through more aggressive marketing.


Which one of the following, if true, casts the most doubt on the conclusion above?
A. Most of the major carpet producers market other floor coverings as well.
B. Most established carpet producers market several different brand names and varieties, and there is no remaining niche in the market for new brands to fill.
C. Two of the three mergers in the industrys last ten years led to a decline in profits and revenues for the newly merged companies.
D. Price reductions, achieved by cost-cutting in production, by some of the dominant firms in the carpet market are causing other producers to leave the market altogether.
E. The carpet market is unlike most markets in that consumers are becoming increasingly resistant to new patterns and styles.

its option B

Manhattan, Kaplan, Vertias or the ugly and bad 1000 CR etc?


Can somebody please tell me a good book to practice a lot of CR questions

CRITICAL REASONING QUESTION:
Source: Veritas Prep

Studies show that children who watch too much television are more likely than others to become obese as adults. Jacob, who is an obese adult, must have watched more television as a child than I did, since I am not obese.

Which of the following most closely parallels the logical structure above?

(A) The hardware store on Main Street must have had a bigger advertisement in the Sunday paper than the hardware store around the corner had. The hardware store on Main Street sold twice as many items as the hardware store around the corner did last week, and a Sunday paper advertisement has been shown to increase the number of items sold.
(B) Studies show that large dogs lives shorter lives, on average, than small dogs do. Rex is a large dog and therefore might be expected to live a shorter life than Mustang, who is a small dog.
(C) The county superintendent stated that all schools would be canceled for the day if snowfall last night were greater than six inches. Therefore, since the snowfall was only five inches, we must be following the usual school schedule today.
(D) According to research, people with unusual musical talent do not achieve their true potential unless they are given formal lessons. Therefore Jesse, who has achieved his full musical potential without formal lessons must not have unusual musical talent.
(E) People who like vegetables also like fruits. Elizabeth does not like fruits, so she must not like vegetables either.

vishal pathak Says
Can somebody please tell me a good book to practice a lot of CR questions


OG11, OG12, Verbal review and maybe you can get hold of the CR set provided by Aristotleprep as well for additional practice.

is it B ? for that ques?