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LSAT Logical Reasoning Practice

Practice 60 LSAT logical reasoning questions covering conclusions, assumptions, strengthen and weaken, flaws, inferences, roles, principles, paradoxes, and necessary and sufficient conditions.

Level: LSAT Difficulty: hard 60 questions 60 min
Read each argument, choose the best answer, then review the explanation. Wrong answers are saved locally for review.
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Question 1

All board members support the new policy. The board has final authority over policy changes. Therefore, the new policy will be adopted. Which statement is the conclusion?

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Question 2

Cars in this city produce most of the air pollution. Expanding the subway would reduce car use. If car use falls, pollution will drop. So expanding the subway would improve air quality. Which statement is the conclusion?

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Question 3

Studies show students who sleep at least eight hours score higher. Sleep improves memory consolidation. Therefore, students should prioritize enough sleep before exams. Which statement is the conclusion?

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Question 4

The new software costs more to install. However, it reduces server downtime and lowers maintenance costs. Thus, the software will save money over time. Which statement is the conclusion?

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Question 5

Company profits have risen for three years. The company expanded into online sales during that period. Online sales are likely the main cause of growth. Which statement is the conclusion?

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Question 6

Regular exercise reduces stress and improves heart health. People who exercise also report better sleep. Therefore, regular exercise benefits overall health. Which statement is the conclusion?

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Question 7

The city will reduce traffic by building more bike lanes. The plan assumes that ___.

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Question 8

This medicine is safe because it passed all required trials. The argument assumes that ___.

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Question 9

The survey shows most students prefer online classes, so the school should offer more. The argument assumes that ___.

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Question 10

The restaurant is popular, so its food must be excellent. The argument assumes that ___.

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Question 11

Since the machine was repaired yesterday and worked today, the repair fixed it. The argument assumes that ___.

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Question 12

The new training improved employee productivity. The argument assumes that ___.

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Question 13

A study suggests eating breakfast improves concentration. Which choice would most strengthen the argument?

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Question 14

Bike lanes reduce accidents. Which choice would most strengthen the argument?

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Question 15

The new tax will reduce smoking. Which choice would most strengthen the argument?

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Question 16

Remote work increases productivity. Which choice would most strengthen the argument?

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Question 17

Smaller class sizes improve learning. Which choice would most strengthen the argument?

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Question 18

Reading fiction improves empathy. Which choice would most strengthen the argument?

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Question 19

Because our city added bike lanes, accidents fell. Therefore, bike lanes reduce accidents. Which choice would most weaken the argument?

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Question 20

The company's profits rose after the new CEO arrived. Therefore, the CEO caused the growth. Which choice would most weaken the argument?

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Question 21

Students who attended the prep course scored higher. Therefore, the course works. Which choice would most weaken the argument?

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Question 22

People who drink green tea live longer. Therefore, green tea extends life. Which choice would most weaken the argument?

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Question 23

The town banned plastic bags and litter decreased. Therefore, the ban caused the decrease. Which choice would most weaken the argument?

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Question 24

Higher salaries attract better employees. The company raised salaries and quality improved. Therefore, the raise caused the improvement. Which choice would most weaken the argument?

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Question 25

All managers in this company have degrees. Maria has a degree. Therefore, Maria is a manager. Which flaw does the argument commit?

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Question 26

The last three applicants were friendly, so the next applicant will also be friendly. Which flaw does the argument commit?

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Question 27

The newspaper made one factual error, so its other claims must be false. Which flaw does the argument commit?

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Question 28

Either we cut taxes or the economy will fail. We cannot cut taxes, so the economy will fail. Which flaw does the argument commit?

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Question 29

My neighbor drives fast and has never had an accident, so speed limits are unnecessary. Which flaw does the argument commit?

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Question 30

People who wear glasses are intelligent. Most professors wear glasses. Therefore, wearing glasses makes people intelligent. Which flaw does the argument commit?

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Question 31

All employees at this company must pass a background check. Some employees work remotely. Which statement is most strongly supported?

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Question 32

Every successful applicant in the program has strong writing skills. Maria is an applicant and has strong writing skills. Which conclusion is most strongly supported?

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Question 33

If a city has more parks, its residents exercise more. City A has more parks than City B. Which statement is best supported?

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Question 34

The shipment arrived late because the port was closed during a storm. The port has reopened. Which statement is most strongly supported?

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Question 35

Political scientists note that countries with independent courts attract more foreign investment. The writer concludes that strengthening judicial independence will boost investment. Which role does the first sentence play?

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Question 36

Proponents argue that electric buses reduce emissions. Critics reply that their cost is high and charging infrastructure is limited. Which role does the claim about charging infrastructure play?

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Question 37

Some doctors say the new drug is effective because two studies found fewer symptoms. Critics respond that both studies were small and industry-funded. How is the critics' response used?

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Question 38

Principle: A store should honor a posted price only when a reasonable customer would have understood the price as final. Situation: A store's website listed a laptop for $199 instead of $1,999, and the error was corrected within an hour. Which application is most consistent with the principle?

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Question 39

Principle: Schools should provide accommodations when a student's disability substantially limits access to instruction. Situation: A student with a documented condition cannot use the standard online exam format. Which application is most consistent?

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Question 40

A bookstore raised its prices and expected fewer customers, yet its revenue increased. Which would best resolve the paradox?

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Question 41

City X added recycling bins to every park, yet the amount of waste sent to its landfill increased. Which would best resolve the paradox?

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Question 42

To graduate, students at the college must complete an internship. Which statement follows?

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Question 43

A researcher wants to determine whether a new fertilizer increases crop yield. Which design most directly tests the claim?

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Question 44

Politician: My opponent promises lower taxes, but she also supports new spending. These positions cannot both work. Which method of argument is used?

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Question 45

If it rains, the ground is wet. The ground is wet, so it rained. Which argument is most similar in reasoning?

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Question 46

A study found that people who take vitamin D have fewer colds. Which finding would most strengthen the conclusion that vitamin D prevents colds?

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Question 47

A city claims that its new bike-sharing program reduced traffic because traffic fell after launch. Which choice would most weaken the argument?

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Question 48

Principle: A school should refund a course fee only if the student withdrew before the course began. Situation: A student withdrew three days after the course started. Which application is most consistent?

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Question 49

Which of the following would weaken the argument that banning sugar-sweetened drinks reduces obesity? Select all that apply.

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Question 50

A university claims its online program is as effective as its in-person program because final exam scores were equal. Which assumptions must hold for the comparison? Select all that apply.

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Question 51

Which of the following are common flaws when an argument moves from correlation to causation? Select all that apply.

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Question 52

A doctor wants to test whether a new therapy reduces anxiety. Which elements make the study more persuasive? Select all that apply.

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Question 53

Which statements about necessary and sufficient conditions are correct? Select all that apply.

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Question 54

Which of the following would strengthen the argument that remote work improves mental health? Select all that apply.

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Question 55

Which of the following are legitimate ways to evaluate the strength of an argument? Select all that apply.

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Question 56

An argument can be logically valid even if one of its premises is false.

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Question 57

If a study finds a correlation between two variables, it proves that one causes the other.

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Question 58

An assumption is a claim that an argument must accept for its reasoning to work.

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Question 59

A single counterexample can be enough to refute a universal claim.

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Question 60

Complete the term: An argument that attacks the person instead of the argument commits the ___ fallacy.

Course

LSAT Logical Reasoning Foundations Course Five lessons that build LSAT Logical Reasoning skills: finding conclusions, identifying assumptions, strengthening and weakening arguments, recognizing flaws, and handling inferences, principles, roles, and paradoxes. 5 lessons · 75 min

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