100 Hardest Sentence Correction Questions (Oct 1st, 2025 - Nov 1st, 2025) 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 GMAT Club World Cup 2022 (DAY 2): Named after Austrian player Marcus Difficulty: 805+ Level, Meaning/Logical Predication, Modifiers, Parallelism, Source: Competition Questions, Source: Manhattan GMAT 2 In the Battle of Roncevaux Pass in 778, the rearguard of the Frankish Difficulty: 805+ Level, Clauses, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Idioms/Diction/Redundancy, Parallelism, Source: Magoosh 3 Despite the fact that the impact of Daylight Saving Time, at the onset Difficulty: 805+ Level, Meaning/Logical Predication, Subject Verb Agreement, Source: Manhattan GMAT 4 Statisticians have constructed many complex mathematical models design Difficulty: 805+ Level, Meaning/Logical Predication, Source: Manhattan GMAT 5 Although to provide Internet access through wearable technology Google Difficulty: 805+ Level, Subject Verb Agreement, Source: e-GMAT 6 Ending a contentious political stalemate that frightened global Difficulty: 805+ Level, Verb Tense/Form, Source: Veritas Prep 7 GMAT CLUB OLYMPICS: For 800 years the smiths of the Kruijswijk Forge Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Meaning/Logical Predication, Pronouns, Verb Tense/Form, Source: Competition Questions, Source: GMAT Club Tests 8 For Ralph Waldo Emerson, transcendentalism was his professed ideal ove Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Grammatical/Rhetorical Construction, Source: Veritas Prep 9 The ability of neuroscientists to pinpoint the exact locations in the Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Subject Verb Agreement, Source: Magoosh 10 The preliminary agreement to what was to be ... Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Source: GMAT Hacks 11 Descending approximately 4,000 years ago from the African wildcat, it Difficulty: 805+ Level, Modifiers, Source: Manhattan GMAT 12 GMAT Club World Cup 2022 (DAY 4): Down to its last three stores, the o Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions 13 Over 6M hectares of emerald bamboo groves – one fifth of the world’s r Difficulty: 805+ Level, Meaning/Logical Predication, Modifiers, Source: e-GMAT 14 Although most of Kafkas books are centered on either a protagonist's Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Meaning/Logical Predication, Modifiers, Source: Experts' Global 15 Having extracted the BRCA1 and BRCA2 genes from human DNA to isolate Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Pronouns, Source: Veritas Prep 16 Daniel Bernoulli (1700 – 1782) derived the famous fluid equation named Difficulty: 805+ Level, Clauses, Parallelism, Source: Magoosh 17 Those who maintain that technology is negatively rewiring our brains Difficulty: 805+ Level, Parallelism, Source: Magoosh 18 Nelson Mandela is the most unfortunate of men, yet the embodiment of e Difficulty: 805+ Level, Idioms/Diction/Redundancy, Parallelism, Source: GMAT Club Tests 19 A 2009 study from the California State Housing Authority concluded Difficulty: 805+ Level, Modifiers, Parallelism, Punctuation, Source: Veritas Prep 20 Proponents of the school of thought positing that the Americas were Difficulty: 805+ Level, Idioms/Diction/Redundancy, Source: Magoosh 21 A newly released study on the tectonic plates forming the Pacific basi Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Verb Tense/Form, Source: Magoosh 22 While airline travel can be detrimental to your health, many exercise Difficulty: 805+ Level, Idioms/Diction/Redundancy, Modifiers, Subject Verb Agreement, Source: Veritas Prep 23 Recent indications of weakness in the economy have lead consumers to Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Modifiers, Source: Kaplan 24 Pack 14 Q5: In 2018, American cybersecurity executives indicated... Difficulty: 805+ Level, Verb Tense/Form, Source: EMPOWERgmat 25 Anticipating an outbreak of another pandemic, TDI Biotechnology GmbH p Difficulty: 805+ Level, Idioms/Diction/Redundancy, Parallelism, Source: GMAT Club Tests 26 GMAT CLUB OLYMPICS: Painting a picture with a brush is like playing a Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Grammatical/Rhetorical Construction, Idioms/Diction/Redundancy, Source: Competition Questions, Source: GMAT Club Tests 27 Whereas on many petty issues that were not very important for the comp Difficulty: 805+ Level, Idioms/Diction/Redundancy, Parallelism, Source: GMAT Club Tests 28 Isotopes in the recently excavated bones of a 14-year-old girl from th Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Meaning/Logical Predication, Source: Veritas Prep 29 Technological innovations such as the internet, which proliferated at Difficulty: 805+ Level, Comparisons, Idioms/Diction/Redundancy, Pronouns, Verb Tense/Form, Source: Manhattan GMAT 30 As the baby emerges from the darkness of the womb with a rudimentary Difficulty: 805+ Level, Modifiers, Source: Experts' Global 31 The data being collected in the current geological survey are providin Difficulty: 805+ Level, Pronouns, Use of Being, Source: Veritas Prep 32 If medical researchers are correct, then the human microbiome, made up Difficulty: 805+ Level, Modifiers, Source: Magoosh 33 The people of the ancient Near East believed that the Earth’s dry land Difficulty: 805+ Level, Verb Tense/Form, Source: Magoosh 34 In the field of eugenics, geneticists have thoroughly scrutinized the Difficulty: 805+ Level, Adjectives and Adverbs, Source: Veritas Prep 35 12 Days of Christmas GMAT Competition - Day 4: Although German Johann Difficulty: 805+ Level, Adjectives and Adverbs, Whole Sentence Underline, Source: Competition Questions, Source: Manhattan GMAT 36 In order to be converted into high-quality digital versions, analog au Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Modifiers, Subject Verb Agreement, Source: Manhattan GMAT 37 Recent studies have shown that the antioxidants found in the acai berr Difficulty: 805+ Level, Comparisons, Modifiers, Pronouns, Source: Manhattan GMAT 38 In Hinduism, cows are considered sacred and are given the highest Difficulty: 805+ Level, Parallelism, Source: Experts' Global 39 After all the recent political changes, the Syrians are figuring out Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Source: Veritas Prep 40 Brutus and Cassius, in participating in the brutal assassination of Ju Difficulty: 805+ Level, Clauses, Grammatical/Rhetorical Construction, Grammatical/Rhetorical Construction, Source: Magoosh 41 Bioconservatives, a group who believe that technological innovation th Difficulty: 805+ Level, Comparisons, Modifiers, Parallelism, Subject Verb Agreement, Source: Veritas Prep 42 There are a few acts of nature, such as a total solar eclipse or a Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Parallelism, Source: Veritas Prep 43 Purchasers of television advertising are increasingly discouraged by Difficulty: 805+ Level, Parallelism, Source: Manhattan GMAT 44 With the private space industry at the early stages of launch revoluti Difficulty: 805+ Level, Subject Verb Agreement, Source: Kaplan 45 Medieval monks, through their manuscript illuminations, meticulously Difficulty: 805+ Level, Modifiers, Source: Veritas Prep 46 Where once the union had acquiesced to the prejudices of its English Difficulty: 805+ Level, Modifiers, Source: 1000 Series, Source: Manhattan GMAT 47 Motive of the crime decides whether the guilty, after the legal Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Parallelism, Source: Experts' Global 48 Commanding the defenses of Charleston Harbor at the start of the Ameri Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Meaning/Logical Predication, Modifiers, Source: Experts' Global 49 HOT Competition 2 Sep/8PM: With temperatures at minus 88 degrees Fahre Difficulty: 805+ Level, Parallelism, Source: Competition Questions 50 As the housing affordability gap widens, middle-income families are es Difficulty: 805+ Level, Parallelism, Source: 1000 Series 51 While the Eastern Whip-poor-will a nocturnal bird that feeds Difficulty: 805+ Level, Clauses, Comparisons, Source: Veritas Prep 52 GMAT CLUB OLYMPICS: In a recent neurological study of the intraparieta Difficulty: 805+ Level, Idioms/Diction/Redundancy, Meaning/Logical Predication, Modifiers, Source: Competition Questions, Source: GMAT Club Tests 53 At nearly 38 million dollars, one of the least costly options being co Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Source: Veritas Prep 54 The paradox of longer, drier droughts and larger, more devastating flo Difficulty: 805+ Level, Meaning/Logical Predication, Modifiers, Source: EMPOWERgmat 55 The British hospitality industrys cost to address issues related to t Difficulty: 805+ Level, Idioms/Diction/Redundancy, Meaning/Logical Predication, Modifiers, Whole Sentence Underline, Source: Experts' Global 56 The standard framework of cap and trade is fundamentally conservative, Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Parallelism, Source: Manhattan GMAT 57 Examples of "tulipomania," a term coined from the tulip craze of the Difficulty: 805+ Level, Parallelism, Source: Manhattan GMAT 58 Although there is still disagreement among the scientific community Difficulty: 805+ Level, Idioms/Diction/Redundancy, Meaning/Logical Predication, Modifiers, Source: Manhattan GMAT 59 The proposed simplification of the tax code would repeal or Difficulty: 805+ Level, Subject Verb Agreement, Source: Aristotle 60 Once thought to be impossible, Alex Honnold successfully free soloed Difficulty: 805+ Level, Meaning/Logical Predication, Modifiers, Source: Manhattan GMAT 61 Early medieval monasteries, while clearly less accessible to Difficulty: 805+ Level, Modifiers, Source: Kaplan 62 Because of the fear that the company's latest efforts to contain the Difficulty: 805+ Level, Verb Tense/Form, Source: e-GMAT 63 The man was always aware, sometimes proudly and sometimes Difficulty: 805+ Level, Conjunctions (FANBOYS), Verb Tense/Form, Source: 1000 Series 64 The distribution of stars within the Milky Way's central bar, like Difficulty: 805+ Level, Comparisons, Source: Experts' Global 65 Camille Claudet worked continuously through the 1880’s and early 1890’ Difficulty: 805+ Level, Verb Tense/Form, Verb Tense/Form, Source: 1000 Series, Source: GMAT Paper Tests 66 At the time of the Mexican agrarian revolution, the most radical facti Difficulty: 805+ Level, Subject Verb Agreement, Verb Tense/Form, Source: 1000 Series, Source: OG 1988, Source: Official Guide (Pre-2000) 67 At the heart of euro crisis is Mrs. Merckel’s lack of quick or bold Difficulty: 805+ Level, Idioms/Diction/Redundancy, Source: e-GMAT 68 Okonkwo, the protagonist of Chinua Achebes novel Things Fall Apart Difficulty: 805+ Level, Comparisons, Idioms/Diction/Redundancy, Pronouns, Verb Tense/Form, Source: Experts' Global 69 Contemporary accounts of the life of Charlemagne, crowned emperor by Difficulty: 805+ Level, Parallelism, Source: Kaplan 70 Out of the public’s interest in the details of and conflicts in other Difficulty: 805+ Level, Subject Verb Agreement, Source: Kaplan 71 Though viewed from a distance, Saturn's main rings may Difficulty: 805+ Level, Comparisons, Grammatical/Rhetorical Construction, Source: Manhattan GMAT 72 Unlike the successors of many Roman towns which are generally Difficulty: 805+ Level, Comparisons, Meaning/Logical Predication, Source: Economist 73 12 Days of Christmas GMAT Competition - Day 10: In evaluating the Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions, Source: Experts' Global 74 12 Days of Christmas GMAT Competition - Day 4: Homeowners who budget Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions, Source: Experts' Global 75 Out of public's interest in the details of and conflicts Difficulty: 805+ Level, Modifiers, Subject Verb Agreement, Source: Kaplan 76 12 Days of Christmas GMAT Competition - Day 1: When regulations that l Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions, Source: Manhattan GMAT 77 At approximately 22 weeks, a fetus becomes fully covered by lanugo, or Difficulty: 805+ Level, Modifiers, Source: Magoosh 78 In good years, the patchwork of green fields that surround Difficulty: 805+ Level, Modifiers, Subject Verb Agreement, Subject Verb Agreement, Source: 1000 Series 79 Pack 16 Q4: Some wildlife managers recognize that the impact... Difficulty: 805+ Level, Parallelism, Source: EMPOWERgmat 80 Building large new hospitals in the bistate area would constitute a wa Difficulty: 805+ Level, Adjectives and Adverbs, Grammatical/Rhetorical Construction, Source: 1000 Series, Source: OG 1988, Source: Official Guide (Pre-2000) 81 Because the Supreme Court has ruled that the prosecution in a job disc Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Modifiers, Verb Tense/Form, Source: GMAT Prep 82 Historical revisionism is different from history in that the former Difficulty: 805+ Level, Meaning/Logical Predication, Source: Experts' Global 83 Carbon monoxide levels in the atmosphere grew by enough of an increase Difficulty: 805+ Level, Modifiers, Pronouns, Source: Manhattan GMAT 84 Classical guitar was neither prestigious nor was often played in conce Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Modifiers, Verb Tense/Form, Verb Tense/Form, Source: Manhattan GMAT 85 Discovered by the scientists from the Chinese Academy of Science (CAS) Difficulty: 805+ Level, Modifiers, Source: GMAT Club Tests 86 A recent study showed that the constant roar of jet aircraft could be Difficulty: 805+ Level, Parallelism, Verb Tense/Form, Source: Kaplan 87 In assessing the problems faced by rural migrant workers the question Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Meaning/Logical Predication, Modifiers, Pronouns, Source: OG 1988, Source: Official Guide (Pre-2000) 88 Spains governing coalition has come under strain as it pushes its Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Modifiers, Whole Sentence Underline, Source: Veritas Prep 89 Having evolved to survive in the pitch black darkness and crushing pre Difficulty: 805+ Level, Meaning/Logical Predication, Modifiers, Subject Verb Agreement, Source: Experts' Global 90 Because country music plays on more radio stations there and is thus Difficulty: 805+ Level, Parallelism, Source: Kaplan 91 Prairie dogs live in tight-knit colonies, called coteries, of roughly Difficulty: 805+ Level, Modifiers, Parallelism, Pronouns, Source: GMAT Club Tests 92 Dante Rossetti and his colleagues, in calling their group the Difficulty: 805+ Level, Parallelism, Source: Magoosh 93 Asias biggest democracy and, in Japan, its richest one, were on oppos Difficulty: 805+ Level, Adjectives and Adverbs, Pronouns, Source: Economist 94 The total remittance transfers sent across the world Difficulty: 805+ Level, Modifiers, Source: Veritas Prep 95 The near extinction of the feral bee population in some parts of the U Difficulty: 805+ Level, Modifiers, Source: Kaplan 96 The selection of figures on the Frieze of Parnassus reflects Difficulty: 805+ Level, Use of Being, Source: GMAT Hacks 97 Since the 1980s, when Chile adopted free market economic policies Difficulty: 805+ Level, Grammatical/Rhetorical Construction, Meaning/Logical Predication, Modifiers, Source: Manhattan GMAT 98 Around the World in 80 Questions (Day 6): Accepting the proposed Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions, Source: Experts' Global 99 12 Days of Christmas GMAT Competition - Day 10: A substance derived Difficulty: 805+ Level, Adjectives and Adverbs, Source: Competition Questions, Source: Experts' Global 100 Supporters of tax breaks that local governments award to businesses ea Difficulty: 805+ Level, Idioms/Diction/Redundancy, Pronouns, Source: Manhattan GMAT

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100 Hardest and easiest questions for SC as of October 2025

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rcfarhat

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27 Mar 2018, 18:13

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sayantanc2k

Do you think is it worth continue practising with easy level exercises em SC ?
Or should I focus only on moderate and harder exercises.

Thank you

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rcfarhat

sayantanc2k

Do you think is it worth continue practising with easy level exercises em SC ?
Or should I focus only on moderate and harder exercises.

Thank you

You probably only want to focus on areas you have issues with or make mistakes in (in a progressive difficulty fashion).
E.g. if you have no issues with Subject Verb Agreement (SVA) questions in the 600-level, then move to 700. However, if you are still making mistakes in the 600-level and not hitting 90% accuracy, I would recommend NOT moving to the higher level questions.

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18 May 2018, 04:28

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Question No. 32 and 44 are repeated, in Easy category : ) so 149 : P

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19 May 2018, 05:41

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hero_with_1000_faces

Question No. 32 and 44 are repeated, in Easy category : ) so 149 : P

Thank you. Two separate discussions but the same question. I have moved one of them into the SC Archive, so it should not happen again.

teaserbae

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22 May 2018, 02:20

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Thanks @bunnel any similar post for RC ?

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15 Apr 2019, 05:42

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procman

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.

I agree with this. I tried Kaplan Qbank and some of the items there had questionable explanations, not to mention that some are just flat our typos that were misleading.

Is there any way to filter out only official GMAT questions in GMAT Club? I don't want to destroy my progress by drilling through inconsistent unofficial questions.

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MrSandman

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Thank you for this resource! It's awesome!

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31 Aug 2020, 08:26

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It will be better if you just add medium difficulty question also it will help us to transition to difficult question

mivas

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20 Nov 2021, 11:55

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Pointers after solving all easy questions:
1. Important parallelism triggers are
Not only...but also (most questions are based on this ), either.. or, neither..nor, or and and.
2. Comparions
Like x , y ; unlike x , y ;
3. Modifier
Verb ing or verb Ed modifier at start of a sentence modifying a noun.
4. Idioms
More..than, as much.. as, the more..the greater
5.avoiding should after order or suggestion on gmat

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14 Jul 2022, 11:20

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This is such a bullshit compilation that my eyes bleed. None of the "hard" questions are official, and the few I've looked at are full of mistakes. If you're studying for the test, do yourself a favor and use only official gmat questions. Mods, get rid of this please.

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14 Jul 2022, 11:32

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yulzari

Hello there. Allow me to clarify a few things:

This list is not a compilation ... it is a list that we automatically generate every month based on what questions were the hardest and easiest in the previous month per the GMAT Club timer. There is no requirement that it must contain only a particular source... It simply reflects the reality of what people found to be HARD and EASY. We do not discriminate and while some questions may get on this list due to the original poster issues, many appear from legit sources.

However, you are correct that there is a pattern, if you look at the HARDEST list - usually a few (or this month, none) are from the official sources but if you look at the EASIEST questions list (post #2) - it is MOSTLY filled with the official questions. https://gmatclub.com/forum/150-hardest- ... l#p1564180 so while your call to use the official questions for verbal is a good general advice, it is also a very vague generalization and as valuable as generalizations tend to be.

yulzari

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14 Jul 2022, 12:14

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That a question takes a long time to solve doesn't necessarily mean that it is difficult. It may simply mean that the question is bad and misleading.

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14 Jul 2022, 13:59

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yulzari

That a question takes a long time to solve doesn't necessarily mean that it is difficult. It may simply mean that the question is bad and misleading.

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Hi. This is a different topic of discussion. This is talking about evaluating difficulty which does not have much to do with the original comment of official questions.

The impact of time on the performance of the task is an interesting component that has to do with individual skills. Something that is easy for one may be difficult to another - e.g. writing with your non-dominant hand or moving your ears or enjoying quant vs. enjoying history. When you have a large group of people how do you rank the tasks of learning how to master writing with your non-dominant hand, moving ears, or solving complex equations if you don't take time into consideration? In some cases, Time is more valuable than money in evaluating the ROI but before we go there, you are not wrong either. I would say taking a long time for a question in Quant is something you can argue a question that is artificially difficult. There are a few I have seen in quant that are not tricky or unusual but the standard rate/distance/speed question that simply requires an extra step or two to solve. It is an easy and perhaps not a very elegant and rather a crude way of making it more difficult and in that case you can say it is more tedious. It eats your time, so on a simulated test it would make the test harder even though the question is not really complex... I am not familiar of such approach in SC. How would you make an SC long to solve? Do you have an example of an SC that is going to take long to solve? I have seen some equally long official and unofficial questions.

I am genuinely curious curious about the definition of difficulty of a question and what it should involve. Compare 2 tasks: was building the Egyptian pyramids less difficult than putting a man on the moon? One task was done by thousands of people over dozens of years by a primitive society and the other was done by a small group of highly qualified individuals. One was a very long repetitive task and the other one was one of a kind. My guess is you would find putting a man on the moon more difficult than building the pyramids but if it is not difficult, why nobody has done it over or better? Is knowing how to do something automatically makes it easy? Is all sports then easy? Are athletes not really hard workers? Is it easy to earn a gold medal in Olympics?

carmenamos

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It's great to find such a wonderful thread.

VerbalBot

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