150 Hardest Sentence Correction Questions (Aug 1st, 2018 - Sep 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	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
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	First published in 1946, and comparing the ways the world	Difficulty: 700-Level, Modifiers, Participle Parallelism, Verb Tense/Form
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	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	The Mars Exploration Program established that the main scientific goal	Difficulty: 700-Level, Idioms, Parallel Structure, Source: Other - Please specify
8	Unlike conventional thinking that early tribes of Apache	Difficulty: 700-Level, Comparisons, Modifiers, Source: Other - Please specify
9	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
10	Among the important themes that characterize Chinese history are the p	Difficulty: 700-Level, Parallel Structure, Subject Verb Agreement, Source: Other - Please specify
11	Ending a contentious political stalemate that frightened global	Difficulty: 700-Level, Debatable OA, Verb Tense/Form, Source: Veritas Prep
12	Even though his predilection for initiating legal proceedings against	Difficulty: 700-Level, Absolute Phrase, Meaning, Style and Usage, Source: Self-made question
13	In what promises to be an alternative to corneal transplantation	Difficulty: 700-Level, Clauses, Grammatical Construction, Modifiers, Source: Other - Please specify
14	Assuming that the people's party have the results in their favor, the	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
15	There was great debate among Greek historians whether the	Difficulty: 700-Level, Verb Tense/Form
16	Descending approximately 4,000 years ago from the African	Difficulty: 700-Level, Source: Other - Please specify
17	For Ralph Waldo Emerson, transcendentalism was his professed	Difficulty: 700-Level, Grammatical Construction, Style and Usage, Source: Veritas Prep
18	The preliminary agreement to what was to be ...	Difficulty: 700-Level, Construction, Idioms, Source: Gmat Hacks
19	Clear communication is one of the key ingredients	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
20	Diagnostic Verbal Test No. 5 Q# 13 SC	Difficulty: 700-Level, Comparisons, Verb Tense/Form, Verb Voice, Source: Other - Please specify
21	The higher productivity rate of some Japanese companies relative to	Difficulty: 700-Level, Style and Usage, Source: Other - Please specify
22	A newly released study on the tectonic plates forming the Pacific	Difficulty: 700-Level, Construction, Idioms, Verb Tense/Form, Source: Magoosh
23	The data being collected in the current geological survey are providin	Difficulty: 700-Level, Pronouns, Use of Being, Source: Veritas Prep
24	Verbal Diagnostic Test No : 7 – SC Q No: 7	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
25	The word inspired is used often by numerous critics in their descripti	Difficulty: 700-Level, Modifiers, Pronouns, Style and Usage, Source: Economist Gmat
26	The ability of neuroscientists to pinpoint the exact locations in the	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Magoosh
27	The International Seabed Authority will oversee the new system by next	Difficulty: 700-Level, Source: Other - Please specify
28	Having extracted the BRCA1 and BRCA2	Difficulty: 700-Level, Grammatical Construction, Pronouns, Source: Veritas Prep
29	It is equally well known that a GPS satellite needs an extremely accur	Difficulty: 700-Level, Comparisons, Grammatical Construction, Source: Other - Please specify
30	Industry representatives maintain that the new	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Self-made question
31	Those who maintain that technology is negatively rewiring our brains	Difficulty: 700-Level, Parallel Structure, Source: Magoosh
32	A 2009 study from the California State Housing Authority concluded tha	Difficulty: 700-Level, Parallel Structure, Punctuation, Which/That, Source: Veritas Prep
33	With no policy restricting the number of children a family can have an	Difficulty: 700-Level, Clauses, Parallel Structure
34	Gustav Klimt, in his leadership of the Vienna Secession, lending more	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
35	The Sri-NuanSri-Nuan dance and Teut-Teung dance are an	Difficulty: 700-Level, Comparisons, Grammatical Construction, Style and Usage, Source: Economist Gmat
36	Both the oil experts advice that inventory of heating oil	Difficulty: 700-Level, Idioms, Subjunctive, Verb Tense/Form
37	There are a few acts of nature, such as a total solar	Difficulty: 700-Level, Grammatical Construction, Parallel Structure, Source: Veritas Prep
38	A country could keep some of the advantages of being in the European U	Difficulty: 700-Level, Adjectives and Adverbs, Source: Other - Please specify
39	Daniel Bernoulli derived the famous fluid equation	Difficulty: 700-Level, Clauses, Parallel Structure, Source: Magoosh
40	The manager at the office supply store believes that the new	Difficulty: 700-Level, Comparisons, Diction, Parallel Structure, Source: Knewton
41	Nelson Mandela is the most unfortunate of men, yet the embodiment of e	Difficulty: 700-Level, Diction, Parallel Structure, Source: GMAT Club Tests
42	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
43	In the field of eugenics, geneticists have thoroughly	Difficulty: 700-Level, Adjectives and Adverbs, Source: Veritas Prep
44	Originally a trading port, Hong-Kong, currently estimated to be fourth	Difficulty: 700-Level, Clauses, Debatable OA, Modifiers
45	Bioconservatives, a group who believe	Difficulty: 700-Level, Comparisons, Modifiers, Parallel Structure, Subject Verb Agreement, Source: Veritas Prep
46	In New York today, Italians account for more than 14 percent	Difficulty: 700-Level, Construction, Source: Other - Please specify
47	Recent indications of weakness in the economy have lead consumers to	Difficulty: 700-Level, Idioms, Modifiers, Style and Usage, Source: Kaplan
48	Technological advancements affect all aspects of human	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
49	The bolas spider, in its sticky globules,	Difficulty: 700-Level, Modifiers, Source: Princeton Review
50	The paradox of the Roman empires history is marked by the	Difficulty: 700-Level, Parallel Structure, Participle Parallelism
51	After all the recent political changes, the Syrians are figu	Difficulty: 700-Level, Style and Usage, Source: Veritas Prep
52	Although there is still disagreement among the scientific community	Difficulty: 700-Level, Idioms, Meaning, Modifiers, Source: Manhattan GMAT
53	It is possible to hold a certain image	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
54	While the Eastern Whip-poor-will a nocturnal bird that feeds	Difficulty: 700-Level, Clauses, Comparisons, Source: Veritas Prep
55	The officialdom, shocked and frightened by the general unrest, expande	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
56	Unlike previous presidents, Donald Trump’s administration is radically	Difficulty: 700-Level, Comparisons, Diction, Idioms, Source: Self-made question
57	Recent studies have shown that the antioxidants found in the acai berr	Difficulty: 700-Level, Comparisons, Modifiers, Pronouns, Source: Manhattan GMAT
58	The people of the ancient Near East believed that the Earth’s dry land	Difficulty: 700-Level, Verb Tense/Form, Source: Magoosh
59	Proponents of the school of thought positing that the Americas were	Difficulty: 700-Level, Idioms, Source: Magoosh
60	Brutus and Cassius, in participating in the brutal assassination of Ju	Difficulty: 700-Level, Clauses, Construction, Style and Usage, Source: Magoosh
61	In good years, the patchwork of green fields that surround	Difficulty: 700-Level, Modifiers, Nouns, Subject Verb Agreement
62	Although realizing late that it had failed to honor its own stalwart	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
63	Assuming that the People’s Party have the results in their favour,	Difficulty: 700-Level, Meaning, Source: Other - Please specify
64	Although the Broadway musical known as "Hair"	Difficulty: 700-Level, Clauses, Modifiers, Source: Other - Please specify
65	Building large new hospitals in the bistate area would	Difficulty: 700-Level, Adjectives and Adverbs, Grammatical Construction, Source: 1000 Series
66	Jamboree and GMAT Club Contest: Patriarchal in nature, with a strong	Difficulty: 700-Level
67	In 1950s, when Mother Theresa wanted to form an orphanage	Difficulty: 700-Level, Verb Tense/Form
68	In most major metropolitan areas, the number of hate crimes per capita	Difficulty: 700-Level, Resources, Source: Princeton Review
69	Though viewed from a distance, Saturn's main rings may	Difficulty: 700-Level, Comparisons, Style and Usage, Source: Manhattan GMAT
70	In the wake of World War I, the terms of the Versailles treaty restric	Difficulty: 700-Level, Subjunctive, Source: Economist Gmat
71	At approximately 22 weeks, a fetus becomes fully covered by lanugo, or	Difficulty: 700-Level, Modifiers, Source: Magoosh
72	After reviewing a recent survey into parenthood, psychologis	Difficulty: 700-Level, Construction, Source: Economist Gmat
73	One Question a day – Q#2 SC 26022014	Difficulty: 700-Level, Comparisons, Modifiers, Source: Self-made question
74	If medical researchers are correct, then the human microbiome, made up	Difficulty: 700-Level, Modifiers, Source: Magoosh
75	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
76	#Top150 SC: For Ralph Waldo Emerson, transcendentalism was his	Difficulty: 700-Level, Grammatical Construction, Style and Usage, Source: Veritas Prep
77	Examples of "tulipomania," a term coined from the tulip craze of the	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
78	The endurance and consistency of baseball star Lou Gehrig,	Difficulty: 700-Level
79	Out of public's interest in the details of and conflicts	Difficulty: 700-Level, Modifiers, Subject Verb Agreement, Source: Kaplan
80	Medieval monks, through their manuscript illuminations, meticulously	Difficulty: 700-Level, Modifiers, Source: Veritas Prep
81	Molly Ireland argues that though we are seldom aware of	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Other - Please specify
82	After leaving the ranch, the herds of longhorns,the historic cattle of	Difficulty: 700-Level, Subject Verb Agreement
83	The misnomer that sibling rivalry is a thing of the 'past'	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
84	In order to cover the fees for a particularly expensive lawsuit	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
85	As the housing affordability gap widens, middle-income	Difficulty: 700-Level
86	Constructive dialogue is one of the fundamentals	Difficulty: 700-Level, Conjunctions, Style and Usage, Subject Verb Agreement, Source: Other - Please specify
87	Although the market tempts guitarists with digital signal	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
88	QOTD: Prairie dogs live in tight-knit colonies	Difficulty: 700-Level, Absolute Phrase, Pronouns, Parallel Structure, Source: GMAT Club Tests, Source: Question of the Day
89	The General Agreement on Trade & Tariffs was a landmark deal in commit	Difficulty: 700-Level, Adjectives and Adverbs, Source: Other - Please specify
90	Purchasers of television advertising are increasingly discouraged by	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
91	The wealthy and influential, trying to distinguish themselves by being	Difficulty: 700-Level, Gerund, Source: Other - Please specify
92	In his writings on evolutionary robotics, Rodney Brooks, arguing again	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
93	Classical guitar was neither prestigious nor was often	Difficulty: 700-Level, Grammatical Construction, Modifiers, Verb Tense/Form, Verb Voice, Source: Manhattan GMAT
94	Pronoun Revision: Supporters of tax breaks that local governments	Difficulty: 700-Level, Pronouns, Source: Manhattan GMAT
95	Until 2010, a state tax regulation known as the 80-20 rule	Difficulty: 700-Level, Such as/Like, Source: Veritas Prep
96	As is “ordinary” chocolate, which can be soft and sweet or	Difficulty: 700-Level, Comparisons, Construction, Parallel Structure, Source: Other - Please specify
97	QOTD: Since the end of the recently extended	Difficulty: 700-Level, Adjectives and Adverbs, Modifiers, Pronouns, Verb Tense/Form, Which/That, Source: GMAT Club Tests, Source: Question of the Day
98	Because the Supreme Court has ruled that the prosecution	Difficulty: 700-Level, Construction, Verb Tense/Form, Which/That, Source: GMAT Prep QP1, Source: Princeton Review
99	After years of record drought, declines in California’s reserves	Difficulty: 700-Level, Construction, Diction, Source: Other - Please specify
100	Unlike those in early 20th century detective novels, the world of 1950	Difficulty: 700-Level, Parallel Structure, Subject Verb Agreement, Source: Other - Please specify
101	If a nuclear weapon were to be detonated above the	Difficulty: 700-Level
102	The recent discovery of a red oak tree sap that is	Difficulty: 700-Level, Comparisons, Construction, Modifiers, Parallel Structure, Punctuation, Which/That, Source: Knewton
103	Carefully conceived by NASA to stimulate microgravity	Difficulty: 700-Level, Meaning, Modifiers, Style and Usage, Source: Other - Please specify
104	Firmly established by the 12th century, the various pilgrimage routes	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
105	At the time of the Mexican agrarian revolution, the most radical facti	Difficulty: 700-Level, Nouns, Verb Tense/Form, Source: Magoosh, Source: Veritas Prep
106	An amendment to section 362-SC-Economist GMAT Tutor	Difficulty: 700-Level, Construction, Style and Usage, Source: Economist Gmat
107	Flamboyant sybarites that they were, the later generations	Difficulty: 700-Level, Pronouns, Style and Usage
108	The selection of figures on the Frieze of Parnassus reflects	Difficulty: 700-Level, Use of Being, Source: Gmat Hacks
109	Even though computer technology has made creating musiC	Difficulty: 700-Level, Clauses, Conjunctions, Style and Usage, Source: Economist Gmat
110	#Top150 SC: The word inspired is used often by numerous critics	Difficulty: 700-Level, Modifiers, Pronouns, Style and Usage, Source: Economist Gmat
111	#Top150 SC: There are a few acts of nature	Difficulty: 700-Level, Grammatical Construction, Parallel Structure, Source: Veritas Prep
112	Dr. Sayres lecture recounted several little-known episodes	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
113	A course of cognitive behavior therapy can be as effective, if not mo	Difficulty: 700-Level, Resources, Source: Other - Please specify
114	In assessing the problems faced by rural migrant workers,	Difficulty: 700-Level, Construction, Source: 1000 Series
115	Because the population is denser there and the auto mobile	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, Modifiers, Source: Manhattan GMAT
117	QOTD: The deer, despite having traveled hundreds	Difficulty: 700-Level, Modifiers, Pronouns, Subject Verb Agreement, Verb Tense/Form, Which/That, Source: GMAT Club Tests, Source: Question of the Day
118	In Hinduism, cows are considered sacred and are given the highest	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
119	Contemporary accounts of the life of Charlemagne, crowned	Difficulty: 700-Level, Parallel Structure
120	As U.S. nuclear attack submarines prowl their familiar haunt	Difficulty: 700-Level, Clauses, Source: 1000 Series
121	The Poison Dart Frog and the Inland Taipan are the most poisonous anim	Difficulty: 700-Level, Grammatical Construction, Style and Usage, Source: Economist Gmat
122	Camille Claudet SC problem	Difficulty: 700-Level, Source: GMAT Paper Test
123	After the famine that ravaged Somalia at the end of last	Difficulty: 700-Level, Pronouns, Source: Other - Please specify
124	At the heart of euro crisis is Mrs. Merckel’s lack of quick or bold	Difficulty: 700-Level, Idioms, Source: Other - Please specify
125	Our understanding was that she would continue to cover the	Difficulty: 700-Level, Source: GMAT Club Tests
126	In contrast to the tense private drama, Act III is brought	Difficulty: 700-Level, Comparisons, Source: Other - Please specify
127	There is generally agreement that feral swine are unwelcome - such as	Difficulty: 700-Level, Verb Tense/Form, Such as/Like, Source: Veritas Prep
128	According to a recent study of home buyers	Difficulty: 700-Level, Comparisons, Grammatical Construction, Source: Other - Please specify
129	A survey conducted on the marketing departments of some of Europe's to	Difficulty: 700-Level, Idioms, Source: Economist Gmat
130	RAGCT Day 14: At nearly 38 million dollars, one	Difficulty: 700-Level, Construction, Source: Veritas Prep
131	While industry insiders insist that fish farming takes a burden off	Difficulty: 700-Level, Construction, Parallel Structure, Participle Parallelism, Source: Other - Please specify
132	With Saha's unfortunate injury, either Rishab Pant or Dinesh karthik	Difficulty: 700-Level, Subject Verb Agreement
133	Immigration wages will be paid bi-weekly, monthly, or not at	Difficulty: 700-Level, Construction, Grammatical Construction, Style and Usage, Source: Other - Please specify
134	In Rembrandt's The Night Watch, in the second plane of the	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
135	As virtually all the nation's 50 busiest airports are	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
136	RAGCT 2015 Day 10: Glacier and ice patch archaeologists	Difficulty: 700-Level, Subject Verb Agreement, Verb Tense/Form, Source: e-GMAT
137	The Colorado trading community paid a huge premium when it chose	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
138	According to a recent study linking high social standing to a habitual	Difficulty: 700-Level, Modifiers, Source: GMAT Club Tests
139	Supporters of tax breaks that local governments award to businesses ea	Difficulty: 700-Level, Idioms, Pronouns, Source: Manhattan GMAT
140	The controversy has divided the Senate, caused strains in	Difficulty: 700-Level, Participle Parallelism, Source: Veritas Prep
141	Early medieval monasteries, while clearly less accessible to	Difficulty: 700-Level, Modifiers, Source: Kaplan
142	Running is one of the activities that greatly increase cardiovascular	Difficulty: 700-Level, Conjunctions, Pronouns, Source: Economist Gmat
143	Unsurprisingly, commitment in the team was low but it was also evident	Difficulty: 700-Level, Meaning, Subjunctive, Verb Tense/Form, Source: Other - Please specify
144	Why painting the face and perfuming the body should have persisted	Difficulty: 700-Level, Construction, Verb Tense/Form, Source: Other - Please specify
145	Hurricane resistant classification is given by the	Difficulty: 700-Level, Debatable OA, Source: Princeton Review
146	Stymieing the Armadas plans to meet up with the Duke of	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
147	Uninformed about students experience in urban classrooms,	Difficulty: 700-Level, Source: Knewton
148	In the middle of the 19th century, mathematician turned computer scien	Difficulty: 700-Level, Modifiers, Source: Magoosh
149	Goldstein cleverly compares the objective of the so-called “formalist	Difficulty: 700-Level, Idioms, Infinitive, Verb Tense/Form, Source: Other - Please specify
150	Research during the past several decades on the nature of	Difficulty: 700-Level, Grammatical Construction, Modifiers, Parallel Structure, Source: 1000 Series

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.