100 Hardest Sentence Correction Questions (Apr 1st, 2020 - May 1st, 2020)

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 SC forum.

Sentence Correction (SC)
Rank	Title	Topics
1	A mountainous country subject to bitter cold during the winter, eighty	Difficulty: 700-Level, Meaning, Modifiers, Source: Other - Please specify
2	First published in 1946, and comparing the ways the world	Difficulty: 700-Level, Modifiers, Participle Parallelism, Verb Tense/Form
3	The 1996 Mid-sea Continent Journalist Tea Party Award winner, a certai	Difficulty: 700-Level, Gerund, Idioms, Parallel Structure, Source: Other - Please specify
4	Despite the fact that the impact of Daylight Saving Time, at the onset	Difficulty: 700-Level, Meaning, Subject Verb Agreement, Source: Manhattan GMAT
5	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
6	Although to provide Internet access through wearable technology Google	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
7	The Mars Exploration Program established that the main scientific goal	Difficulty: 700-Level, Idioms, Parallel Structure, Source: Other - Please specify
8	There is a difference in the way the term "turnover" and the term "rev	Difficulty: 700-Level, Conjunctions, Grammatical Construction, Source: Economist Gmat
9	Statisticians have constructed many complex mathematical models design	Difficulty: 700-Level, Meaning, Source: Manhattan GMAT
10	The International Seabed Authority will oversee the new system by next	Difficulty: 700-Level, Source: Other - Please specify
11	Originally delivered as the first William James Lecture at Harvard, in	Difficulty: 700-Level, Diction, Modifiers
12	Unlike conventional thinking that early tribes of Apache had reached	Difficulty: 700-Level, Comparisons, Modifiers, Source: Other - Please specify
13	Among the important themes that characterize Chinese history are the p	Difficulty: 700-Level, Parallel Structure, Subject Verb Agreement, Source: Other - Please specify
14	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
15	Ending a contentious political stalemate that frightened global	Difficulty: 700-Level, Debatable OA, Verb Tense/Form, Source: Veritas Prep
16	Even though his predilection for initiating legal proceedings against	Difficulty: 700-Level, Absolute Phrase, Meaning, Style and Usage, Source: Self-made question
17	Assuming that the people's party have the results in their favor, the	Difficulty: 700-Level, Subject Verb Agreement, Source: Experts' Global
18	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
19	There was great debate among Greek historians whether the	Difficulty: 700-Level, Verb Tense/Form
20	Descending approximately 4,000 years ago from the African wildcat, it	Difficulty: 700-Level, Modifiers, 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	For Ralph Waldo Emerson, transcendentalism was his professed ideal ove	Difficulty: 700-Level, Grammatical Construction, Style and Usage, Source: Veritas Prep
23	Relief for the thousands of traumatized victims of one of the worst na	Difficulty: 700-Level, Poor Quality
24	The preliminary agreement to what was to be ...	Difficulty: 700-Level, Construction, Idioms, Source: Gmat Hacks
25	Verbal Diagnostic Test No : 7 – SC Q No: 7	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
26	With the private space industry at the early stages of a launch revolu	Difficulty: 700-Level, Grammatical Construction, Subject Verb Agreement, Source: Other - Please specify
27	The word inspired is used often by numerous critics in their descripti	Difficulty: 700-Level, Modifiers, Pronouns, Style and Usage, Source: Economist Gmat
28	In what promises to be an alternative to corneal transplantation in	Difficulty: 700-Level, Clauses, Grammatical Construction, Modifiers, Source: Other - Please specify
29	The ability of neuroscientists to pinpoint the exact locations in the	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Magoosh
30	In the thirty years since casino gambling has been legal beyond the st	Difficulty: 700-Level, Comparisons, Parallel Structure, Source: Other - Please specify
31	Having extracted the BRCA1 and BRCA2 genes from human DNA to isolate	Difficulty: 700-Level, Grammatical Construction, Pronouns, Source: Veritas Prep
32	A newly released study on the tectonic plates forming the Pacific basi	Difficulty: 700-Level, Construction, Idioms, Verb Tense/Form, Source: Magoosh
33	Those who maintain that technology is negatively rewiring our brains	Difficulty: 700-Level, Parallel Structure, Source: Magoosh
34	The 1950 Graver Tank & Manufacturing Co. v. Linde Air Products Co. Sup	Difficulty: 700-Level, Clauses, Grammatical Construction, Modifiers, Pronouns, Source: Other - Please specify
35	A 2009 study from the California State Housing Authority concluded	Difficulty: 700-Level, Parallel Structure, Punctuation, Which/That, Source: Veritas Prep
36	While airline travel can be detrimental to your health, many exercise	Difficulty: 700-Level, Idioms, Modifiers, Subject Verb Agreement, Source: Veritas Prep
37	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
38	The data being collected in the current geological survey are providin	Difficulty: 700-Level, Pronouns, Use of Being, Source: Veritas Prep
39	Public enthusiasm that had been growing for airline travel, still in	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
40	With no policy restricting the number of children a family can have an	Difficulty: 700-Level, Clauses, Parallel Structure
41	Daniel Bernoulli (1700 – 1782) derived the famous fluid equation named	Difficulty: 700-Level, Clauses, Parallel Structure, Source: Magoosh
42	Technological innovations such as the internet, which proliferated at	Difficulty: 700-Level, Comparisons, Meaning, Which/That, Source: Manhattan GMAT
43	Proponents of the school of thought positing that the Americas were	Difficulty: 700-Level, Idioms, Source: Magoosh
44	It is equally well known that a GPS satellite needs an extremely accur	Difficulty: 700-Level, Comparisons, Grammatical Construction, Source: Other - Please specify
45	Technological advancements affect all aspects of human	Difficulty: 700-Level, Verb Tense/Form, Source: Economist Gmat
46	Gustav Klimt, in his leadership of the Vienna Secession, lending more	Difficulty: 700-Level, Modifiers, Source: Economist Gmat
47	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
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	Isotopes in the recently excavated bones of a 14-year-old girl from th	Difficulty: 700-Level, Construction, Meaning, Source: Veritas Prep
50	Both the oil experts advice that inventory of heating oil	Difficulty: 700-Level, Idioms, Subjunctive, Verb Tense/Form
51	The policy of applying indirect taxes, like value added tax and excise	Difficulty: 700-Level, Clauses, Source: Knewton
52	Recent studies have shown that the antioxidants found in the acai berr	Difficulty: 700-Level, Comparisons, Modifiers, Pronouns, Source: Manhattan GMAT
53	There seems to be a broad range of international policy issues on whic	Difficulty: 700-Level, Comparisons, Construction, Grammatical Construction, Meaning, Pronouns, Parallel Structure, Redundancy, Source: Other - Please specify
54	A country could keep some of the advantages of being in the European U	Difficulty: 700-Level, Adjectives and Adverbs, Source: Other - Please specify
55	The standard framework of cap and trade is fundamentally conservative,	Difficulty: 700-Level, Construction, Parallel Structure, Source: Manhattan GMAT
56	Unsurprisingly, commitment in the team was low but it was also evident	Difficulty: 700-Level, Meaning, Subjunctive, Verb Tense/Form, Source: Other - Please specify
57	Recent indications of weakness in the economy have lead consumers to	Difficulty: 700-Level, Idioms, Modifiers, Style and Usage, Source: Kaplan
58	Bioconservatives, a group who believe that technological innovation th	Difficulty: 700-Level, Comparisons, Modifiers, Parallel Structure, Subject Verb Agreement, Source: Veritas Prep
59	The manager at the office supply store believes that the new CLP-300	Difficulty: 700-Level, Comparisons, Diction, Parallel Structure, Source: Knewton
60	The bolas spider, in its sticky globules,	Difficulty: 700-Level, Modifiers, Source: Princeton Review
61	After all the recent political changes, the Syrians are figuring out	Difficulty: 700-Level, Style and Usage, Source: Veritas Prep
62	In the field of eugenics, geneticists have thoroughly scrutinized the	Difficulty: 700-Level, Adjectives and Adverbs, Source: Veritas Prep
63	There are a few acts of nature, such as a total solar eclipse or a	Difficulty: 700-Level, Grammatical Construction, Parallel Structure, Source: Veritas Prep
64	Industry representatives maintain that the new	Difficulty: 700-Level, Construction, Subject Verb Agreement, Source: Self-made question
65	The paradox of the Roman empires history is marked by the	Difficulty: 700-Level, Parallel Structure, Participle Parallelism
66	If medical researchers are correct, then the human microbiome, made up	Difficulty: 700-Level, Modifiers, Source: Magoosh
67	If a nuclear weapon were to be detonated above the atmosphere, it woul	Difficulty: 700-Level, Parallel Structure, Source: Self-made question
68	The people of the ancient Near East believed that the Earth’s dry land	Difficulty: 700-Level, Verb Tense/Form, Source: Magoosh
69	In most major metropolitan areas, the number of hate crimes per capita	Difficulty: 700-Level, Debatable OA, Subject Verb Agreement, Source: Princeton Review
70	Originally a trading port, Hong-Kong, currently estimated to be fourth	Difficulty: 700-Level, Clauses, Debatable OA, Modifiers
71	Purchasers of television advertising are increasingly discouraged by	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
72	While the Eastern Whip-poor-will a nocturnal bird that feeds	Difficulty: 700-Level, Clauses, Comparisons, Source: Veritas Prep
73	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
74	In 1950s, when Mother Theresa wanted to form an orphanage with only th	Difficulty: 700-Level, Verb Tense/Form
75	Carefully conceived by NASA to stimulate microgravity, a device called	Difficulty: 700-Level, Meaning, Modifiers, Style and Usage, Source: Other - Please specify
76	Since 1959, McKinsey & Company, and Harvard Business Review have prese	Difficulty: 700-Level, Idioms, Subject Verb Agreement, Source: Other - Please specify
77	Gen. Joseph Hooker initially seized the advantage at the Battle of Cha	Difficulty: 700-Level, Verb Tense/Form, Source: Magoosh
78	It is possible to hold a certain image in your mind for long periods	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
79	The International Registration Plan is a registration reciprocity	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
80	As the housing affordability gap widens, middle-income families are es	Difficulty: 700-Level, Parallel Structure, Source: 1000 Series
81	Although realizing late that it had failed to honor its own stalwart	Difficulty: 700-Level, Parallel Structure, Source: Other - Please specify
82	Examples of "tulipomania," a term coined from the tulip craze of the	Difficulty: 700-Level, Parallel Structure, Source: Manhattan GMAT
83	The ancient Greek philosopher Aristotle implied that such contradictio	Difficulty: 700-Level, Subject Verb Agreement, Source: Other - Please specify
84	Unlike the African elephant, whose trunk contains two fingers used to	Difficulty: 700-Level, Clauses, Comparisons
85	In New York today, Italians account for more than 14 percent	Difficulty: 700-Level, Construction, Source: Other - Please specify
86	The officialdom, shocked and frightened by the general unrest, expande	Difficulty: 700-Level, Modifiers, Source: Other - Please specify
87	The misnomer that sibling rivalry is a thing of the 'past' history- wh	Difficulty: 700-Level, Grammatical Construction, Source: Other - Please specify
88	With Saha's unfortunate injury, either Rishab Pant or Dinesh karthik	Difficulty: 700-Level, Subject Verb Agreement
89	In Hinduism, cows are considered sacred and are given the highest	Difficulty: 700-Level, Parallel Structure, Source: Experts' Global
90	Building large new hospitals in the bistate area would constitute a wa	Difficulty: 700-Level, Adjectives and Adverbs, Grammatical Construction, Source: 1000 Series, Source: OG 1988, Source: Official Guide [Pre-2000]
91	Motive of the crime decides whether the guilty, after the legal	Difficulty: 700-Level, Construction, Parallel Structure, Source: Experts' Global
92	Although there is still disagreement among the scientific community	Difficulty: 700-Level, Idioms, Meaning, Modifiers, Source: Manhattan GMAT
93	In good years, the patchwork of green fields that surround	Difficulty: 700-Level, Modifiers, Nouns, Subject Verb Agreement, Source: 1000 Series
94	At approximately 22 weeks, a fetus becomes fully covered by lanugo, or	Difficulty: 700-Level, Modifiers, Source: Magoosh
95	Unlike previous presidents, Donald Trump’s administration is radically	Difficulty: 700-Level, Comparisons, Diction, Idioms, Source: Self-made question
96	Though viewed from a distance, Saturn's main rings may	Difficulty: 700-Level, Comparisons, Style and Usage, Source: Manhattan GMAT
97	I picture it as a botanical utopia: a place where flora is respected	Difficulty: 700-Level, Diction, Punctuation, Source: Other - Please specify
98	Their Diamond Princess, quarantined off Yokohama, which suffered over	Difficulty: 700-Level, Grammatical Construction
99	Once thought to be impossible, Alex Honnold successfully “free soloed”	Difficulty: 700-Level, Meaning, Modifiers, Source: Manhattan GMAT
100	A year advantage in a new computer product or process being	Difficulty: 700-Level, Poor Quality

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.