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Quizzes > Quizzes for Business > Education

Master the LSAT Logical Reasoning Practice Test

Enhance Critical Thinking with Logical Puzzles

Difficulty: Moderate
Questions: 20
Learning OutcomesStudy Material
Colorful paper art illustrating a quiz on LSAT Logical Reasoning Practice Test

Ready to sharpen your LSAT logical reasoning skills? Joanna Weib invites you to take this comprehensive LSAT logical reasoning practice test, featuring a variety of inference and analysis challenges. Suitable for aspiring law students and educators alike, this quiz offers instant feedback and the flexibility to adjust questions in our editor. Explore similar Logical Reasoning Quiz or dive deeper with the Logical Argument Structure Assessment . Discover more quizzes to keep refining your critical thinking.

In the argument below, which statement is the conclusion? "Because the new software reduces processing time by 50%, the company will implement it to increase efficiency."
The new software reduces processing time by 50%.
Efficiency will increase.
Because the new software reduces processing time by 50%.
The company will implement the new software to increase efficiency.
The conclusion states what the arguer seeks to establish - that the company will implement the software to increase efficiency. The reduction in processing time is offered as support, not the main point.
Which of the following is a premise in the argument: "Several studies show that drinking green tea improves concentration. Therefore, students should drink green tea before exams."
Green tea tastes good.
Students should drink green tea before exams.
Drinking green tea improves concentration.
Several studies show that drinking green tea improves concentration.
The statement about several studies provides support for the recommendation and functions as a premise. The recommendation itself is the conclusion, and taste is irrelevant.
The city plans to replace diesel buses with electric trams to reduce pollution. This plan assumes what about trams?
Commuters prefer trams over buses.
Trams produce less air pollution than diesel buses per passenger.
Electric trams are quieter than buses.
Trams cost more to build than buses.
The argument presumes that electric trams will indeed reduce pollution compared to diesel buses. Without that assumption, replacing buses would not achieve the claimed benefit.
Identify the flaw in this argument: "All roses are flowers. Some flowers fade quickly. Therefore, some roses fade quickly."
Begging the question.
Straw man fallacy.
Appeal to authority.
Illicit conversion of a premise.
The argument mistakenly infers that because some flowers fade quickly, some roses (a subset of flowers) must also fade quickly. This is illicit conversion since the premise does not support that reversal.
The mayor claimed that after installing speed bumps, accidents decreased. Therefore, speed bumps caused the decrease in accidents. What flaw does this argument commit?
Post hoc ergo propter hoc (false cause).
Circular reasoning.
Ad hominem.
Equivocation.
The argument assumes a causal link solely because one event followed another. It commits the post hoc fallacy by attributing the reduction in accidents directly to speed bumps without ruling out other factors.
The council argues: "If law X is enforced, crime rates will drop. Law X is enforced. Therefore, crime rates have dropped." Which assumption is required for this argument to hold?
All crime is reported accurately.
Crime rates are measured monthly.
Law X was created because crime rates were high.
No other factor could prevent crime rates from dropping.
The argument assumes that nothing else interfered with the effect of enforcing law X. Without that assumption, enforcement alone might not guarantee a drop in crime rates.
Which choice most strengthens the argument: "Teachers who receive training teach more effectively. Ms. Hall teaches effectively. Therefore, Ms. Hall has received training."
Some teachers teach effectively without any training.
Ms. Hall has attended some workshops.
Only teachers with training teach effectively.
Training programs vary in quality.
Stating that only trained teachers teach effectively removes alternative explanations for effective teaching and directly supports the conclusion that Ms. Hall must have been trained.
Which of the following would most weaken the argument: "The new medication cured 80% of trial patients; therefore, it will be effective for the general population."
The trial group was small and unrepresentative.
The medication has no side effects.
Eighty percent is a high success rate.
Other medications have similar success rates.
If the trial group isn't representative, the success rate may not generalize to the broader population. This directly undermines the leap from trial results to general effectiveness.
Identify the parallel flaw: "If a movie is popular, it has great special effects. This film is not popular. Therefore, it lacks great special effects."
If it rains, the ground gets wet. It's raining; therefore, the ground is wet.
All dogs bark. Fido barks; therefore, Fido is a dog.
Some fruits are red. Apples are red; therefore, apples are fruits.
If you study, you pass. You didn't study; therefore, you didn't pass.
The original argument denies the antecedent: from ¬P derive ¬Q. Choice A commits the same flaw by inferring failure to pass from not studying.
Given: "All linguists are scientists. Some scientists are mathematicians." What can be validly inferred?
Some linguists are mathematicians.
All mathematicians are linguists.
Some scientists are not linguists.
All scientists are linguists.
From 'All linguists are scientists' and 'Some scientists are mathematicians,' we know some scientists lie outside the linguist group. Hence, some scientists are not linguists.
According to the principle that "a law is just only if it respects personal privacy rights," is a law prohibiting all audio recording at public protests just?
No, because it infringes on the right to record personal speech.
Yes, because it prevents misconduct.
Yes, because protests are public events.
No, because protesters don't want to be recorded.
The principle requires respect for personal privacy rights. A blanket ban on audio recording at public protests restricts individuals' ability to record speech, violating that right.
An economic principle states: "Only policies with consistently positive outcomes in past studies should be implemented." Would adopting a policy that reduced unemployment but increased inflation be justified under this principle?
Yes, if inflation stays below 2%.
No, because the outcomes are not consistently positive.
No, because no policy ever has mixed results.
Yes, because unemployment is more important.
The policy yields mixed results - positive on unemployment but negative on inflation - so it fails the criterion of consistently positive outcomes and is therefore unjustified.
From the statements "All A are B" and "No B are C," which conclusion must be true?
Some C are A.
All B are C.
All C are A.
No A are C.
If every A is within B and no B overlaps with C, then A cannot overlap with C. This is a classic syllogistic deduction.
Identify the flaw: "Paranormal activity exists because I have experienced it firsthand, which shows that paranormal activity exists."
Straw man.
Ad hominem.
Circular reasoning.
Equivocation.
The argument assumes its conclusion (that paranormal activity exists) as a premise by citing personal experience without independent evidence, thus reasoning in a circle.
According to the rule "No animal testing is permitted unless there is no non-animal alternative," which scenario violates the rule?
Testing a drug on cell cultures only.
Observing animal behavior without intervention.
Experimenting on mice when a validated in vitro test exists.
Using computer models to predict toxicity.
The rule forbids animal testing if a non-animal option exists. Conducting experiments on mice despite an available in vitro alternative directly violates this prohibition.
Which answer exhibits the same flaw as this argument? "All high-achieving students study at least two hours daily. Jamie studies two hours daily. Therefore, Jamie is a high-achieving student."
If you exercise, you lose weight. You lost weight; therefore, you exercised.
If it rains, the ground is wet. The ground is wet; therefore, it rained.
If you read, you learn. You didn't read; therefore, you didn't learn.
All birds can fly. Penguins are birds. Therefore, penguins can fly.
The original argument affirms the consequent: from 'studies two hours' deducing 'high-achiever.' Choice C mirrors this by inferring exercise from weight loss.
Given these statements: (1) Either A or B is true. (2) If B is true, then C is true. (3) C is false. What follows?
C is true.
A is true.
Neither A nor B is true.
B is true.
Since C is false, B cannot be true (by statement 2). Because either A or B must be true (by 1), A must be true.
A principle states: "Regulations must apply uniformly to all groups." Which scenario violates this principle?
A permit fee charged only to nonresident vendors.
A noise ordinance that applies city-wide.
A curfew for minors and adults alike.
A tax applied evenly to all income brackets.
Charging the fee exclusively to nonresident vendors treats that group differently and fails to apply the rule uniformly to all vendors.
Which assumption does this argument rely on? "If we want to reduce budget deficits, we must cut public healthcare spending. Therefore, cutting healthcare is the only way to eliminate deficits."
The public opposes tax increases.
Deficits are measured annually.
No other spending cuts or revenue increases can reduce the deficit.
Healthcare spending is the largest budget item.
The conclusion that healthcare cuts are the only solution presumes that no alternative cuts or revenue measures can reduce the deficit, which is the required assumption.
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Learning Outcomes

  1. Analyse argument structures in LSAT logical reasoning questions
  2. Evaluate assumptions and conclusions critically
  3. Identify logical fallacies and reasoning flaws
  4. Apply process of elimination to answer choices
  5. Master inference and principle-based question techniques
  6. Demonstrate improved timing and accuracy under test conditions

Cheat Sheet

  1. Understand LSAT Logical Reasoning Structure - Jump into LSAC's official breakdown of Logical Reasoning prompts and answer choices to see how questions are built. Recognizing patterns early on helps you breeze through sections with confidence. View LSAC Sample Questions
  2. Identify Premises and Conclusions - Master the skill of picking out the building blocks of every argument by spotting premises and conclusions. This clarity empowers you to dissect any argument's core and assess its strength. Learn with PowerScore
  3. Spot Common Logical Fallacies - Train your eye to catch sneaky traps like ad hominem digs or false dilemmas that can derail your reasoning. Recognizing these pitfalls sharpens your critique and helps you choose the right answer. Explore Fallacy Examples
  4. Develop Targeted Strategies - Tailor your approach to each question type - whether it's making an assumption or drawing an inference. Having a go-to tactic for every question style boosts both speed and accuracy. Try Varsity Tutors Practice Tests
  5. Master the Process of Elimination - Learn to rule out obviously wrong choices on the fly, leaving you with fewer options and higher odds of success. This simple yet powerful skill can be your secret weapon on test day. Practice Elimination Techniques
  6. Enhance Conditional Reasoning - Get comfortable with "if-then" statements, necessary vs. sufficient conditions, and chain reasoning. These concepts are the backbone of many complex questions and a must-know for mastery. Deep Dive into Conditional Reasoning
  7. Simulate Real Test Conditions - Take full-length official practice exams under timed settings to build stamina and reduce test-day jitters. Regular rehearsals help you fine-tune timing and stay calm when the pressure's on. Get Official LSAT Practice Tests
  8. Boost Reading Comprehension Skills - Strengthen your ability to swiftly interpret dense passages and spot subtle argument nuances. Better reading habits translate directly into clearer, more accurate answer choices. Improve Comprehension Tips
  9. Review Answer Explanations - Study detailed breakdowns of correct and incorrect answers to uncover patterns and common traps. This reflection turns every practice question into a powerful learning opportunity. Analyze with Varsity Tutors
  10. Maintain a Growth Mindset - Celebrate small wins, learn from mistakes, and keep your spirits high as you progress. Patience and persistence are key ingredients to leveling up your Logical Reasoning skills. Find Motivation and Tips
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