Topic / 110 questions

Critical Reasoning MCQs

Page 2 of Critical Reasoning multiple-choice questions with answers. Tap an option to check yourself.

Page 2 of 6

Question 21 Critical Reasoning

Argument: A company says its new fertiliser raised wheat yields, because farms using it produced 20% more wheat this year. Which of the following, if true, most strengthens the argument?

Correct answer C. Nearby farms that did not use it, with the same weather and soil, saw no increase in yield

Open question
Question 22 Critical Reasoning

Argument: Since the new security guard was hired, thefts in the market have fallen, so the guard is responsible for the fall. Which of the following, if true, most weakens the argument?

Correct answer B. Thefts fell by the same amount in neighbouring markets that hired no new guards

Open question
Question 23 Critical Reasoning

Argument: Our coaching centre is the best in the city, because 90% of our students passed the entrance test. Which of the following, if true, most weakens the argument?

Correct answer D. The centre admits only students who already scored highly in a screening test

Open question
Advertisement
Question 24 Critical Reasoning

Argument: Brand X toothpaste reduces tooth decay, because people who use it visit the dentist less often. Which of the following, if true, most weakens the argument?

Correct answer A. Brand X is sold mostly in areas with very few dentists

Open question
Question 25 Critical Reasoning

Argument: The town must build a larger car park because the current one is full every morning. Which of the following, if true, most weakens the argument?

Correct answer C. A large car park two minutes away remains mostly empty every morning

Open question
Question 26 Critical Reasoning

Argument: Skipping breakfast causes poor concentration, because students who skip breakfast score lower on concentration tests. Which of the following, if true, most weakens the argument?

Correct answer C. Students who skip breakfast also tend to sleep much less, and lack of sleep reduces concentration

Open question
Question 27 Critical Reasoning

Argument: Online classes are as effective as classroom teaching, since online students in the course earned the same average marks as classroom students. Which of the following, if true, most weakens the argument?

Correct answer C. The online students sat an easier version of the examination

Open question
Question 28 Critical Reasoning

Argument: The new medicine is safe, because no side effects were reported during a two-week trial with 20 volunteers. Which of the following, if true, most weakens the argument?

Correct answer B. Side effects of similar medicines usually appear only after several months of use

Open question
Question 29 Critical Reasoning

Argument: The rise in umbrella sales last month was caused by our new advertisement. Which of the following, if true, most weakens the argument?

Correct answer A. The rise came with the start of the monsoon, when umbrella sales go up every year

Open question
Advertisement
Question 30 Critical Reasoning

Argument: Residents of Riverside are healthier than residents of Hillside because Riverside has more gyms. Which of the following, if true, most weakens the argument?

Correct answer D. Riverside residents are, on average, much younger than Hillside residents

Open question
Question 31 Critical Reasoning

Argument: A survey of the gym’s members found 95% satisfaction, so the gym provides excellent service. Which of the following, if true, most weakens the argument?

Correct answer D. The survey was sent only to members who had renewed, not to those who left

Open question
Question 32 Critical Reasoning

Argument: Moving the weekly market to Sunday will increase its sales, because more people are free on Sundays. Which of the following, if true, most weakens the argument?

Correct answer B. A much larger market in the next town already runs on Sundays and draws most local shoppers there

Open question
Question 33 Critical Reasoning

Argument: Hiring more traffic police will greatly reduce congestion in the city centre. Which of the following, if true, most weakens the argument?

Correct answer C. Studies show the congestion comes mainly from too many vehicles for the road space, not from drivers breaking rules

Open question
Question 34 Critical Reasoning

Argument: “Ravi’s father is a successful doctor, so Ravi will certainly become a successful doctor too.” Which best describes the flaw in this reasoning?

Correct answer C. It assumes a son will have the same ability and career as his father without any evidence

Open question
Question 35 Critical Reasoning

Argument: “Most students in my class like cricket, so most young people in the country like cricket.” Which best describes the flaw in this reasoning?

Correct answer B. It generalises from a small group that may not represent the whole country

Open question
Advertisement
Question 36 Critical Reasoning

Argument: “We should ignore Shabana’s advice on saving electricity, because she left her own lights on yesterday.” Which best describes the flaw in this reasoning?

Correct answer D. It rejects the advice by criticising the person rather than examining the advice itself

Open question
Question 37 Critical Reasoning

Argument: “Either we build a new hospital this year, or the health of the whole town will collapse.” Which best describes the flaw in this reasoning?

Correct answer D. It presents only two options when other choices, such as improving existing clinics, exist

Open question
Question 38 Critical Reasoning

Argument: “Soon after the new manager joined, it rained heavily for a week, so the new manager brings bad luck.” Which best describes the flaw in this reasoning?

Correct answer B. It assumes that because one event followed another, the first caused the second

Open question
Question 39 Critical Reasoning

Event I: Many flights at the city airport were delayed in the morning. Event II: Many trains around the city ran late in the morning, and drivers reported very poor visibility. Which option best describes the relationship between the two events?

Correct answer A. Both events are effects of a common cause

Open question
Question 40 Critical Reasoning

A city introduced a charge for cars entering the city centre during peak hours. Which is the most likely effect of this measure?

Correct answer A. More commuters use public transport to reach the centre at peak hours

Open question