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100 Hardest CR Questions on the Forum

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100 Hardest CR Questions on the Forum [#permalink] New post 24 Oct 2013, 05:25
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100 Hardest Critical Reasoning Questions

Are you familiar with the GMAT Club's timer? We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the hardest questions in each of the question forums we have. Below I am presenting to you the top 100 questions from CR forum.
Critical Reasoning (CR)
Rank Title Topics
1At present the Hollywood Restaurant has only standard-height Weaken/Debatable OA
2Beginning in 1997, high school seniors in State Q have been Conclusion/Numbers & Percent
3The rise in free, do-it-yourself instructions on the Inference
4In Patton City, days are categorized as having heavy Conclusion/CR Resources
5In Patton City, days are categorized as having heavy Inference/Must be True
6A veterinary pharmaceutical manufacturer implemented Debatable OA/Evaluate Argument
7Studies have shown that a large percentage of car accidents Inference
8Two types of earthworm, one black and one red-brown, inhabit Strengthen/Numbers & Percent
9When cable TV consumers evade cable access fees by Assumption
10Modern navigation systems, which are found in most of today Bold Face CR/Numbers & Percent
11In a monogamous culture, 100% of the adults are married. The Inference/Cause and Effect
12Iridium, a hard, whitish metal similar to platinum, is Strengthen
13Gasoline Cars in Papula Country Weaken
14According to recent research, a blindfolded person whose Assumption
15Recently, the research and development departments at major Assumption
16Recently, some critics of the U.S. government have pointed Weaken
17Certain instruments used in veterinary surgery can be made Additional Evidence/Must be True
18The rise in free,do-it-yourself instructions on the internet Inference
19Lark Manufacturing Company initiated a voluntary Quality Strengthen/Weaken
20Psychologist: Though popularized by the media and even some Strengthen
21Greek tragedy, one of the enduring pillars of our belief Resolve Paradox
22The Daisygen Company genetically engineers flowers which are Assumption
23Literary critics are concerned by a recent trend in book Evaluate Argument
24Nearly all mail that is correctly addressed arrives at its Must be True
25Advocates argue that five-cent bottle deposits charged on Evaluate Argument
26Consumer Advocate: The new soft drink, Mango Paradise, Assumption
27Biologists have noted reproductive abnormalities in fish Weaken
28Last January, in an attempt to lower the number of traffic
29In order to raise revenue, the federal government planned a Strengthen
30Surveys show that every year only 10 percent of cigarette Conclusion/Numbers & Percent
31Left-handed persons have an advantage over right-handed Inference
32In the modern era, society should accept the premise that Weaken/CR Resources/Debatable OA
33Instead of blaming an automobile accident on driver error, Assumption
34The snack food market has recently seen an explosion in the Additional Evidence
35Brunhilda: Economists have predicted that our generation Evaluate Argument/Logical Flaw/Method of Reasoning
36Ellen: All three of Shirley's children have the measles! Assumption
37Farmers get water at subsidized rates that are much lower Evaluate Argument
38Doctors in Britain have long suspected that patients who Weaken
39In a survey of all 14,000 undergraduates in a University, ov Method of Reasoning
40In a forest often visited by the residents of a small town.. Additional Evidence/Debatable OA
41In response to years of increasing congestion at airport X, Strengthen
42Delta products, Inc., has recently switched at least partly Bold Face CR
43Choi: All other factors being equal, children whose parents Logical Flaw
44In the late nineteenth century, the archaeologist Charles Assumption/Out of Scope - Too Hard
45Proponents of airline industry deregulation argued that airl Assumption
46In 1986, the city of Los Diablos had 20 days on which air Additional Evidence/Numbers & Percent
47A product that represents a clear technological advance over Bold Face CR
48Archaeologists have recently found in various grave sites in Method of Reasoning
49Because the government of Laconia provided considerable tax Bold Face CR
50Research has shown that impoverished people in this country Similar Reasoning
51Some say that an asteroid colliding with Earth was Assumption/Similar Reasoning
52Critic: Works of literature often present protagonists who Assumption
53A product that represents a clear technological advance over Bold Face CR
54Now problems require new solutions. And new problems arise Assumption/CR Resources
55A Management protocol system Conclusion
56Wider use of central counterparties (CCPs) Bold Face CR
57A major film studio announced the release date of a movie Debatable OA
58If one of the effects of a genetic mutation makes a Must be True
59People who listen to certain recordings of music are in Conclusion
60Zero CO2 economy - a tricky one Evaluate Argument
61In 1986, the city of Los Diablos had 20 days on which air Strengthen
62If something would have been justifiably regretted if it had Assumption
63Since the new publisher took control, a news magazine s
64Epidemiologist: In Brazil, schistosomiasis and malaria are Strengthen
65Studies show that children who listen too much classic music Similar Reasoning
66In one-round sealed-bid auctions, each prospective buyer Resolve Paradox
67Tiger beetles are such fast runners that they can capture Weaken/Strengthen
68All German philosphers, except for Marx, are idealists. Inference
69Michael: Marriage is increasingly a dying institution. Assumption
70The solution to any environmental problem that is not the Assumption
71In the years since the city of London imposed strict Assumption
72The subway system in New City has recently been running a Strengthen
73Which of the following most logically completes the passage Complete the Passage
74Dr. A: The new influenza vaccine is useless at best and Similar Reasoning
75On a recent expedition to a remote region of northern Resolve Paradox
76In a study of factors affecting employee satisfaction , Logical Flaw
77At present the Hollywood Restaurant has only standard-height Weaken
78For the writers who first gave feudalism its name, the Must be True
79CR---Mayor of Plainsville Assumption
80Publicity campaigns for endangered species are unlikely to Assumption
81On a recent expedition to a remote region of northern Resolve Paradox
82The noise caused by airplanes during takeoff and landing Bold Face CR
83The Earth s rivers constantly carry dissolved salts into its Assumption
84Recent advances in surgical procedures have not decreased
85Products with innovative and appealing designs relative to Bold Face CR
86Radio stations with radio data system (RDS) technology Assumption
87Monarch butterflies, whose average life span is nine months, Complete the Passage
88Doctor: While a few alternative medicines have dangerous Weaken
89In the Business program at a university, all candidates for Must be True/CR Resources
90A team of researchers from MIT studied the effects of Weaken
91On some hot days the smog in Hillview reaches unsafe levels, Logical Flaw
92A new species of fish has just been discovered living in Inference
93Choi: All other factors being equal, children whose parents Evaluate Argument
94Automobile manufacturers often offer incentive programs
95The climbing season of 2006 was the deadliest on record for Resolve Paradox
96Each week, the Department of Defense sends food packages Inference
97Assumption-- Singing in the rain umbrella Assumption
98Radio Stations with radio data system (RDS) technolodgy Assumption
99Although the price of gasoline can sometimes reach uncomfort Evaluate Argument
100From an article in the Wall Street Chronicle: ... Must be True


A note about difficulty and how we determine the hardest questions - we use the GMAT Club timer and user statistics. We use both % of correct answers as well as the average time used. Though this list is very accurate, please keep in mind that minor shifts are expected over time.
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 24 Oct 2013, 05:35
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 24 Oct 2013, 05:37
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 24 Oct 2013, 19:20
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Is there a reason that some of the questions are duplicates (eg. 86 & 98, 4 & 5, and 43 & 93)?
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 24 Oct 2013, 20:53
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avohden wrote:
Is there a reason that some of the questions are duplicates (eg. 86 & 98, 4 & 5, and 43 & 93)?



Thank you - I did not have time to clean this list; that's the main reason, but in reality it is just some questions do get discussed multiple times... esp the hard ones. That's mostly because users do not use the search function. I will clean it up - we have also found a few questions that need to be pulled off this list due to incorrect answers - thank you WaterFlowsUp!
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 27 Oct 2013, 22:35
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bb wrote:
avohden wrote:
Is there a reason that some of the questions are duplicates (eg. 86 & 98, 4 & 5, and 43 & 93)?



Thank you - I did not have time to clean this list; that's the main reason, but in reality it is just some questions do get discussed multiple times... esp the hard ones. That's mostly because users do not use the search function. I will clean it up - we have also found a few questions that need to be pulled off this list due to incorrect answers - thank you WaterFlowsUp!


BB- I can save you a little time regarding duplicates. I copied and pasted the list into excel, then sorted and the list by topic. It enabled me to see the duplicates easily since they were right next to each other. I found a couple more duplicates. Entire List included here:
1 & 77, 3 & 18, 4 & 5, 43 & 93, 46 & 61, 47 & 53, 75 & 81, 86 & 98. Funny - I noticed that since you have two independent samples from each of the duplicates the results are surprisingly similar (e.g 4 & 5, 47 & 53 and 75 & 81.
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 27 Oct 2013, 22:43
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I must say that this list is very helpful to refine your skills as you improve and reach the upper level of CR. Kudos x 100. :-D :-D

On another note - I did a quick analysis of the results on the list and thought it may be useful in terms of what people struggle with. The top categories of the top 100 CR questions are as follows (list factors out duplicates and does not include unspecified categories:
Assumption - 24%
Weaken - 11%
Inference - 9%
Strengthen - 9%
Bold Face - 8%
Evaluate the Arg - 8%

Hope its useful.
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 27 Oct 2013, 22:51
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Wow, Good list BB :good

Hope if possible doing it for SC as well :roll:

Thanks Avohden For you analysis of the repeat questions.


Kudos to you both..
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 27 Oct 2013, 23:06
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GNPTH wrote:
Wow, Good list BB :good

Hope if possible doing it for SC as well :roll:

Thanks Avohden For you analysis of the repeat questions.


Kudos to you both..


GNPTH - you wish has come true :wink:

Here it's for SC http://gmatclub.com/forum/100-hardest-sc-questions-on-the-forum-162101.html
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 28 Oct 2013, 00:32
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Friends ,

Thanks so much for liking the list. I can't emphasis further on how much I am thankful to BB for such an important list. To enhance the goodness , BB has come up with a new set of SC questions. Avohden , great job. Even I missed out that redundant part of the list. I would request users to solve those questions and provide us the feedback if anything is found debatable.

BB,

Welcome :). I suppose it might be better if we can have "EXCEPT" tag to correctly specify. I found 1 question to be faulty, which needs to be removed off the list along with the redundant ones. We also need proper tagging on the source, this is because few sources are unpopular for coming up with the faulty questions and debatable OAs.
1 more request, can we have the list expanded to 200?

Thanking all for the support and coordination.
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 30 Oct 2013, 00:30
Thanks BB, excellent work!
Best.
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Re: 100 Hardest CR Questions on the Forum [#permalink] New post 07 Nov 2013, 05:40
Thank you for sharings. I must improve this section.

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Re: 100 Hardest CR Questions on the Forum   [#permalink] 07 Nov 2013, 05:40
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