150 Hardest Sentence Correction Questions (Nov 1st, 2018 - Dec 1st, 2018)

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 150 questions from SC forum.

Sentence Correction (SC)
Rank	Title	Topics
1	First published in 1946, and comparing the ways the world	Difficulty: 700-Level, Modifiers, Participle Parallelism, Verb Tense/Form
2	The 1996 Mid-sea Continent Journalist Tea Party Award winner, a certai	Difficulty: 700-Level, Gerund, Idioms, Parallel Structure, Source: Other - Please specify
3	In the Battle of Roncevaux Pass in 778, the rearguard of the Frankish	Difficulty: 700-Level, Clauses, Diction, Idioms, Parallel Structure, Style and Usage, Source: Magoosh
4	Although to provide Internet access through wearable technology Google	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
5	Originally delivered as the first William James Lecture at Harvard, in	Difficulty: 700-Level, Diction, Modifiers
6	There is a difference in the way the term turnover and the	Difficulty: 700-Level, Conjunctions, Grammatical Construction, Source: Economist Gmat
7	Unlike conventional thinking that early tribes of Apache	Difficulty: 700-Level, Comparisons, Modifiers, Source: Other - Please specify
8	The Mars Exploration Program established that the main scientific goal	Difficulty: 700-Level, Idioms, Parallel Structure, Source: Other - Please specify
9	Assuming that the people's party have the results in their favor, the	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
10	The policy of applying indirect taxes, like value added tax and excise	Difficulty: 700-Level, Comparisons, Diction, Parallel Structure, Poor Quality, Subject Verb Agreement, Verb Tense/Form, Source: Knewton
11	Among the important themes that characterize Chinese history are the p	Difficulty: 700-Level, Parallel Structure, Subject Verb Agreement, Source: Other - Please specify
12	Even though his predilection for initiating legal proceedings against	Difficulty: 700-Level, Absolute Phrase, Meaning, Style and Usage, Source: Self-made question
13	Ending a contentious political stalemate that frightened global	Difficulty: 700-Level, Debatable OA, Verb Tense/Form, Source: Veritas Prep
14	Descending approximately 4,000 years ago from the African	Difficulty: 700-Level, Source: Other - Please specify
15	In what promises to be an alternative to corneal transplantation	Difficulty: 700-Level, Clauses, Grammatical Construction, Modifiers, Source: Other - Please specify
16	For Ralph Waldo Emerson, transcendentalism was his professed ideal ove	Difficulty: 700-Level, Grammatical Construction, Style and Usage, Source: Veritas Prep
17	The Middle Stone Age, extended for 200,000 years from 300,000 BC TO 50	Difficulty: 700-Level, Comparisons, Verb Tense/Form, Verb Voice, Source: Other - Please specify
18	There was great debate among Greek historians whether the	Difficulty: 700-Level, Verb Tense/Form
19	The preliminary agreement to what was to be ...	Difficulty: 700-Level, Construction, Idioms, Source: Gmat Hacks
20	The International Seabed Authority will oversee the new system by next	Difficulty: 700-Level, Source: Other - Please specify
21	Clear communication is one of the key ingredients that are often lacki	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
22	A newly released study on the tectonic plates forming the Pacific basi	Difficulty: 700-Level, Construction, Idioms, Verb Tense/Form, Source: Magoosh
23	The higher productivity rate of some Japanese companies relative to	Difficulty: 700-Level, Style and Usage, Source: Other - Please specify
24	The word inspired is used often by numerous critics in their descripti	Difficulty: 700-Level, Modifiers, Pronouns, Style and Usage, Source: Economist Gmat
25	The ability of neuroscientists to pinpoint the exact locations in the	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Magoosh
26	Verbal Diagnostic Test No : 7 – SC Q No: 7	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
27	The data being collected in the current geological survey are providin	Difficulty: 700-Level, Pronouns, Use of Being, Source: Veritas Prep
28	It is equally well known that a GPS satellite needs an extremely accur	Difficulty: 700-Level, Comparisons, Grammatical Construction, Source: Other - Please specify
29	Those who maintain that technology is negatively rewiring our brains	Difficulty: 700-Level, Parallel Structure, Source: Magoosh
30	Having extracted the BRCA1 and BRCA2	Difficulty: 700-Level, Grammatical Construction, Pronouns, Source: Veritas Prep
31	The Sri-NuanSri-Nuan dance and Teut-Teung dance are an inherent part	Difficulty: 700-Level, Comparisons, Grammatical Construction, Style and Usage, Source: Economist Gmat
32	A 2009 study from the California State Housing Authority concluded	Difficulty: 700-Level, Parallel Structure, Punctuation, Which/That, Source: Veritas Prep
33	Isotopes in the recently excavated bones of a 14-year-old girl from th	Difficulty: 700-Level, Construction, Meaning, Source: Veritas Prep
34	With no policy restricting the number of children a family can have an	Difficulty: 700-Level, Clauses, Parallel Structure
35	Gustav Klimt, in his leadership of the Vienna Secession, lending more	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
36	In order to be converted into high-quality digital versions, analog au	Difficulty: 700-Level, Grammatical Construction, Modifiers, Style and Usage, Subject Verb Agreement, Source: Manhattan GMAT
37	Both the oil experts advice that inventory of heating oil	Difficulty: 700-Level, Idioms, Subjunctive, Verb Tense/Form
38	The 1950 Graver Tank & Manufacturing Co. v. Linde Air Products Co. Sup	Difficulty: 700-Level, Clauses, Grammatical Construction, Modifiers, Pronouns, Source: Other - Please specify
39	Industry representatives maintain that the new	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Self-made question
40	Daniel Bernoulli derived the famous fluid equation	Difficulty: 700-Level, Clauses, Parallel Structure, Source: Magoosh
41	Technological advancements affect all aspects of human	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
42	The manager at the office supply store believes that the new	Difficulty: 700-Level, Comparisons, Diction, Parallel Structure, Source: Knewton
43	A country could keep some of the advantages of being in the European U	Difficulty: 700-Level, Adjectives and Adverbs, Source: Other - Please specify
44	In the field of eugenics, geneticists have thoroughly	Difficulty: 700-Level, Adjectives and Adverbs, Source: Veritas Prep
45	Bioconservatives, a group who believe	Difficulty: 700-Level, Comparisons, Modifiers, Parallel Structure, Subject Verb Agreement, Source: Veritas Prep
46	The bolas spider, in its sticky globules,	Difficulty: 700-Level, Modifiers, Source: Princeton Review
47	There are a few acts of nature, such as a total solar	Difficulty: 700-Level, Grammatical Construction, Parallel Structure, Source: Veritas Prep
48	Nelson Mandela is the most unfortunate of men, yet the embodiment of e	Difficulty: 700-Level, Diction, Parallel Structure, Source: GMAT Club Tests
49	Originally a trading port, Hong-Kong, currently estimated to be fourth	Difficulty: 700-Level, Clauses, Debatable OA, Modifiers
50	Unsurprisingly, commitment in the team was low but it was also evident	Difficulty: 700-Level, Meaning, Subjunctive, Verb Tense/Form, Source: Other - Please specify
51	After all the recent political changes, the Syrians are figuring out	Difficulty: 700-Level, Style and Usage, Source: Veritas Prep
52	Recent indications of weakness in the economy have lead consumers to	Difficulty: 700-Level, Idioms, Modifiers, Style and Usage, Source: Kaplan
53	The paradox of the Roman empires history is marked by the	Difficulty: 700-Level, Parallel Structure, Participle Parallelism
54	The people of the ancient Near East believed that the Earth’s dry land	Difficulty: 700-Level, Verb Tense/Form, Source: Magoosh
55	While the Eastern Whip-poor-will a nocturnal bird that feeds	Difficulty: 700-Level, Clauses, Comparisons, Source: Veritas Prep
56	In New York today, Italians account for more than 14 percent	Difficulty: 700-Level, Construction, Source: Other - Please specify
57	It is possible to hold a certain image	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
58	Unlike previous presidents, Donald Trump’s administration is radically	Difficulty: 700-Level, Comparisons, Diction, Idioms, Source: Self-made question
59	Recent studies have shown that the antioxidants found in the acai berr	Difficulty: 700-Level, Comparisons, Modifiers, Pronouns, Source: Manhattan GMAT
60	Proponents of the school of thought positing that the Americas were	Difficulty: 700-Level, Idioms, Source: Magoosh
61	If medical researchers are correct, then the human microbiome, made up	Difficulty: 700-Level, Modifiers, Source: Magoosh
62	Although realizing late that it had failed to honor its own stalwart	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
63	Brutus and Cassius, in participating in the brutal assassination of Ju	Difficulty: 700-Level, Clauses, Construction, Style and Usage, Source: Magoosh
64	Although there is still disagreement among the scientific community	Difficulty: 700-Level, Idioms, Meaning, Modifiers, Source: Manhattan GMAT
65	In good years, the patchwork of green fields that surround	Difficulty: 700-Level, Modifiers, Nouns, Subject Verb Agreement
66	Examples of "tulipomania," a term coined from the tulip craze of the	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
67	A cricketer trying to predict the outcome of the one day world cup mat	Difficulty: 700-Level, Verb Tense/Form, Verb Voice, Source: GMAT Club Tests
68	The policy of applying indirect taxes, like value added tax and excise	Difficulty: 700-Level, Clauses, Source: Knewton
69	The court concluded that not only in treating adultery as an offence	Difficulty: 700-Level, Meaning, Source: Other - Please specify
70	Building large new hospitals in the bistate area would constitute a	Difficulty: 700-Level, Adjectives and Adverbs, Grammatical Construction, Source: 1000 Series, Source: OG 1988, Source: Official Guide [Pre-2000]
71	Since 1959, McKinsey & Company, and Harvard Business Review have prese	Difficulty: 700-Level, Idioms, Subject Verb Agreement, Source: Other - Please specify
72	The officialdom, shocked and frightened by the general unrest, expande	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
73	In the wake of World War I, the terms of the Versailles treaty restric	Difficulty: 700-Level, Subjunctive, Source: Economist Gmat
74	Out of public's interest in the details of and conflicts	Difficulty: 700-Level, Modifiers, Subject Verb Agreement, Source: Kaplan
75	Medieval monks, through their manuscript illuminations, meticulously	Difficulty: 700-Level, Modifiers, Source: Veritas Prep
76	Though viewed from a distance, Saturn's main rings may	Difficulty: 700-Level, Comparisons, Style and Usage, Source: Manhattan GMAT
77	In most major metropolitan areas, the number of hate crimes per capita	Difficulty: 700-Level, Resources, Source: Princeton Review
78	A year advantage in a new computer product or process being	Difficulty: 700-Level, Poor Quality
79	In 1950s, when Mother Theresa wanted to form an orphanage	Difficulty: 700-Level, Verb Tense/Form
80	As the housing affordability gap widens, middle-income	Difficulty: 700-Level
81	After reviewing a recent survey into parenthood, psychologis	Difficulty: 700-Level, Construction, Source: Economist Gmat
82	Prairie dogs live in tight-knit colonies, called coteries, of roughly	Difficulty: 700-Level, Absolute Phrase, Pronouns, Parallel Structure, Source: GMAT Club Tests, Source: Question of the Day
83	The misnomer that sibling rivalry is a thing of the 'past'	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
84	After leaving the ranch, the herd of longhorns, the historic cattle of	Difficulty: 700-Level, Subject Verb Agreement
85	With Saha's unfortunate injury, either Rishab Pant or Dinesh karthik	Difficulty: 700-Level, Subject Verb Agreement
86	The endurance and consistency of baseball star Lou Gehrig,	Difficulty: 700-Level
87	Because the Supreme Court has ruled that the prosecution in a job disc	Difficulty: 700-Level, Construction, Verb Tense/Form, Which/That, Source: GMAT Prep QP1, Source: Princeton Review
88	Molly Ireland argues that though we are seldom aware of	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Other - Please specify
89	At approximately 22 weeks, a fetus becomes fully covered by lanugo, or	Difficulty: 700-Level, Modifiers, Source: Magoosh
90	The wealthy and influential, trying to distinguish themselves by being	Difficulty: 700-Level, Gerund, Source: Other - Please specify
91	Carefully conceived by NASA to stimulate microgravity	Difficulty: 700-Level, Meaning, Modifiers, Style and Usage, Source: Other - Please specify
92	If a nuclear weapon were to be detonated above the atmosphere, it woul	Difficulty: 700-Level, Parallel Structure
93	Purchasers of television advertising are increasingly discouraged by	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
94	Classical guitar was neither prestigious nor was often	Difficulty: 700-Level, Grammatical Construction, Modifiers, Verb Tense/Form, Verb Voice, Source: Manhattan GMAT
95	In order to cover the fees for a particularly expensive lawsuit	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
96	Although the Broadway musical known as "Hair"	Difficulty: 700-Level, Clauses, Modifiers, Source: Other - Please specify
97	Jamboree and GMAT Club Contest: Patriarchal in nature, with a strong	Difficulty: 700-Level
98	Since the end of the recently extended recession, prices for all of th	Difficulty: 700-Level, Adjectives and Adverbs, Modifiers, Pronouns, Verb Tense/Form, Which/That, Source: GMAT Club Tests, Source: Question of the Day
99	Unlike those in early 20th century detective novels, the world of 1950	Difficulty: 700-Level, Parallel Structure, Subject Verb Agreement, Source: Other - Please specify
100	Constructive dialogue is one of the fundamentals that are too uncommon	Difficulty: 700-Level, Conjunctions, Style and Usage, Subject Verb Agreement, Source: Other - Please specify
101	Although the market tempts guitarists with digital signal	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
102	In his writings on evolutionary robotics, Rodney Brooks, arguing again	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
103	After years of record drought, declines in California’s reserves	Difficulty: 700-Level, Construction, Diction, Source: Other - Please specify
104	One Question a day – Q#2 SC 26022014	Difficulty: 700-Level, Comparisons, Modifiers, Source: Self-made question
105	Pronoun Revision: Supporters of tax breaks that local governments	Difficulty: 700-Level, Pronouns, Source: Manhattan GMAT
106	The recent discovery of a red oak tree sap that is	Difficulty: 700-Level, Comparisons, Construction, Modifiers, Parallel Structure, Punctuation, Which/That, Source: Knewton
107	He encouraged massive strides in equality, Dr. Martin Luther King Jr.	Difficulty: 700-Level, Gerund, Source: Other - Please specify
108	A course of cognitive behavior therapy can be as effective, if not mo	Difficulty: 700-Level, Resources, Source: Other - Please specify
109	At the time of the Mexican agrarian revolution, the most radical facti	Difficulty: 700-Level, Nouns, Verb Tense/Form, Source: OG 1988, Source: Official Guide [Pre-2000]
110	The selection of figures on the Frieze of Parnassus reflects	Difficulty: 700-Level, Use of Being, Source: Gmat Hacks
111	As is “ordinary” chocolate, which can be soft and sweet or	Difficulty: 700-Level, Comparisons, Construction, Parallel Structure, Source: Other - Please specify
112	Dr. Sayres lecture recounted several little-known episodes	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
113	The General Agreement on Trade & Tariffs was a landmark deal in commit	Difficulty: 700-Level, Adjectives and Adverbs, Source: Other - Please specify
114	Contemporary accounts of the life of Charlemagne, crowned emperor by	Difficulty: 700-Level, Parallel Structure
115	Because the population is denser there and the auto mobile is therefor	Difficulty: 700-Level, Comparisons, Source: Princeton Review
116	A male musician can find a career as a solo performer, an orchestra me	Difficulty: 700-Level, Meaning, Modifiers
117	Goldstein cleverly compares the objective of the so-called “formalist	Difficulty: 700-Level, Idioms, Infinitive, Verb Tense/Form, Source: Other - Please specify
118	According to a recent study linking high social standing to a habitual	Difficulty: 700-Level, Modifiers, Source: GMAT Club Tests
119	Camille Claudet SC problem	Difficulty: 700-Level, Source: GMAT Paper Test
120	After the famine that ravaged Somalia at the end of last	Difficulty: 700-Level, Pronouns, Source: Other - Please specify
121	Even though computer technology has made creating musiC	Difficulty: 700-Level, Clauses, Conjunctions, Style and Usage, Source: Economist Gmat
122	After reviewing a recent survey into parenthood, psychologists claimed	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
123	An amendment to section 362-SC-Economist GMAT Tutor	Difficulty: 700-Level, Construction, Style and Usage, Source: Economist Gmat
124	Flamboyant sybarites that they were, the later generations	Difficulty: 700-Level, Pronouns, Style and Usage
125	Firmly established by the 12th century, the various pilgrimage routes	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
126	At the heart of euro crisis is Mrs. Merckel’s lack of quick or bold	Difficulty: 700-Level, Idioms, Source: Other - Please specify
127	#Top150 SC: There are a few acts of nature	Difficulty: 700-Level, Grammatical Construction, Parallel Structure, Source: Veritas Prep
128	Supporters of tax breaks that local governments award to businesses ea	Difficulty: 700-Level, Idioms, Pronouns, Source: Manhattan GMAT
129	RAGCT 2015 Day 10: Glacier and ice patch archaeologists	Difficulty: 700-Level, Subject Verb Agreement, Verb Tense/Form, Source: e-GMAT
130	#Top150 SC: The word inspired is used often by numerous critics	Difficulty: 700-Level, Modifiers, Pronouns, Style and Usage, Source: Economist Gmat
131	In Hinduism, cows are considered sacred and are given the highest	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
132	In contrast to the tense private drama, Act III is brought	Difficulty: 700-Level, Comparisons, Source: Other - Please specify
133	Running is one of the activities that greatly increase cardiovascular	Difficulty: 700-Level, Conjunctions, Pronouns, Source: Economist Gmat
134	Diesel engines burn as much as 30% less fuel than gasoline engines of	Difficulty: 700-Level, Comparisons, Modifiers, Source: GMAT Prep, Source: GMAT Prep EP2
135	Our understanding was that she would continue to cover the	Difficulty: 700-Level, Source: GMAT Club Tests
136	As U.S. nuclear attack submarines prowl their familiar haunt	Difficulty: 700-Level, Clauses, Source: 1000 Series
137	While industry insiders insist that fish farming takes a burden off	Difficulty: 700-Level, Construction, Parallel Structure, Participle Parallelism, Source: Other - Please specify
138	Entrepreneurs’ and venture capitalists’ concerns are striking	Difficulty: 700-Level, Verb Tense/Form
139	Since the 1980s, when Chile adopted free market economic policies	Difficulty: 700-Level, Debatable OA, Grammatical Construction, Meaning, Modifiers, Source: Manhattan GMAT
140	The controversy has divided the Senate, caused strains in	Difficulty: 700-Level, Participle Parallelism, Source: Veritas Prep
141	A survey conducted on the marketing departments of some of Europe's to	Difficulty: 700-Level, Idioms, Source: Economist Gmat
142	As virtually all the nation's 50 busiest airports are	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
143	The Colorado trading community paid a huge premium when it chose	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
144	Immigration wages will be paid bi-weekly, monthly, or not at	Difficulty: 700-Level, Construction, Grammatical Construction, Style and Usage, Source: Other - Please specify
145	There is generally agreement that feral swine are unwelcome — such as	Difficulty: 700-Level, Verb Tense/Form, Such as/Like, Source: Veritas Prep
146	RAGCT Day 14: At nearly 38 million dollars, one	Difficulty: 700-Level, Construction, Source: Veritas Prep
147	In Rembrandt's The Night Watch, in the second plane of the	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
148	The man was always aware, sometimes proudly and sometimes	Difficulty: 700-Level, Conjunctions, Verb Tense/Form
149	Hurricane resistant classification is given by the	Difficulty: 700-Level, Debatable OA, Source: Princeton Review
150	In the middle of the 19th century, mathematician turned computer scien	Difficulty: 700-Level, Modifiers, Source: Magoosh

Thanks Bunuel for the amazing collection

From the collection, I can observe that the 150 Hardest SC' contain almost no question from the Official Source and 150 Easiest SC' have almost most of the Official questions(GMAT Prep, GMAT Paper Based Test, OG)

If you are consistently getting 100% on all of the questions you posted above in the sub-600 section but missing most of the advanced ones posted above. Where should i focus?

thanks Bunuel .. Any similar posts for CR ? Thanks

Brunnel, are these in ascending order?

I may be the sole dissenting voice but to me studying the above is a waste of time. I just got a V46 and for **** and giggles tried the "700 Level" SC questions above. Literally got 10% of them correct. I'd recommend drilling ONLY official questions. There are plenty of them.

Can you please post 600-700 (Medium) Level difficulty questions as well.

Thanks for the post!
Hardest questions are very challenging!
I don't get any problem with the easy part, but the hard one makes me questioning my basics

Answers are not correct for a lot of questions here. I advice you to only attempt questions that are posted by verified sources. Even if the source says magoosh or veritas, make sure to check if it is posted specifically by them and not some user who has mentioned the above source.
I am saying this because I have taken veritas tests and answer to the question mentioned by one of the users here does not match the answer provided by Veritas. Therefore, you are treading a very dangerous path here. I repeat, please make sure you check the author of the question and only read explanations and answers by verified sources.

Amazing! Thanks for this resource.