Critical Reasoning Test

Ace Logical Reasoning: Test-Prep Practice Questions

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Logical Reasoning Practice Questions

Welcome to our comprehensive collection of stimulus-style practice questions! These questions are designed to sharpen your critical thinking, logical reasoning, and analytical skills. These abilities are crucial for success in many standardized tests. Our carefully crafted questions mirror the format found in prestigious exams like the LSAT, GMAT, and GRE, as well as in many other exams.

Each question presents a brief “stimulus” – a short paragraph containing an argument, scenario, or set of facts – followed by a question and multiple-choice answers. These exercises will challenge you to analyze complex information, identify logical flaws, draw valid conclusions, and evaluate arguments.

 

1. A company found that employees who use standing desks report less back pain. The company plans to require all employees to use standing desks to reduce back pain. Which of the following, if true, would most undermine this plan?
Standing for long periods can cause foot and leg pain
Some employees prefer sitting desks
Standing desks are more expensive than regular desks
Employees who chose standing desks were already more health-conscious
2. An environmental group argues that banning single-use plastic straws will significantly reduce ocean pollution. Which of the following, if true, most weakens this argument?
Plastic straws account for less than 1% of plastic waste in the oceans
Many people prefer using plastic straws over paper alternatives
Some disabled individuals rely on plastic straws for drinking
Biodegradable alternatives to plastic straws are more expensive
3. A pharmaceutical company claims that its new drug is more effective than existing treatments for a certain condition. In a clinical trial, 70% of patients who took the new drug showed improvement, compared to 60% who took a placebo. Which of the following, if true, would most weaken the company's claim?
The clinical trial had a small sample size
Some patients experienced side effects from the new drug
Existing treatments have a success rate of 75%
The improvement was measured over a short period of time
4. All A are B. All B are C. Which of the following must be true based on these premises?
All C are A
All A are C
Some B are not A
Some C are not B
5. A company claims that its new software increases employee productivity by 30%. In a trial, employees using the software completed tasks faster than those not using it. Which of the following, if true, would most weaken the company's claim?
The trial was conducted over a short period of time
Employees using the software reported higher job satisfaction
The tasks completed faster were not representative of typical work duties
The software is more expensive than competing products
6. An advertising agency claims that companies using their services see an average 20% increase in sales. Which of the following, if true, would most weaken this claim?
The agency's fees are higher than the industry average
Companies that use the agency's services tend to be in rapidly growing industries
The agency has won several awards for creative advertising
The agency's client retention rate is above 90%
7. A car manufacturer claims that its new electric vehicle model is more environmentally friendly than gasoline-powered cars. Which of the following, if true, most strengthens this claim?
The electricity used to charge the car comes primarily from renewable sources
The car's battery has a longer lifespan than those of competing electric vehicles
The car's production process generates less pollution than that of gasoline-powered cars
The car has a longer range on a single charge compared to other electric vehicles
8. In a certain country, the number of reported burglaries decreased by 15% last year. The police chief claims this decrease is due to increased police patrols in high-crime areas. Which of the following, if true, would most strengthen the police chief's claim?
The number of police officers in the force remained constant over the past year
There was a significant increase in the number of security cameras installed in residential areas
The decrease in reported burglaries was most pronounced in areas with increased police patrols
The overall crime rate in neighboring countries also decreased during the same period
9. An economist argues that raising the retirement age will help solve the problem of underfunded pension systems. Which of the following, if true, most weakens this argument?
Many people are physically unable to work beyond the current retirement age
Raising the retirement age may lead to higher unemployment rates among younger workers
Some countries with higher retirement ages still face pension funding issues
Life expectancy has increased significantly over the past few decades
10. In a certain species of fish, 10% are born with a rare genetic mutation. Of those with the mutation, 80% survive to adulthood. Of those without the mutation, 60% survive to adulthood. What percentage of adult fish of this species have the mutation?
8%
10%
13%
15%
Questions Answered: 0/10

 

 

These questions assess critical thinking, logical reasoning, and analytical skills. Here’s a list of some exams that typically include such questions:

LSAT (Law School Admission Test)
GMAT (Graduate Management Admission Test)
GRE (Graduate Record Examinations)
MCAT (Medical College Admission Test)
SAT (Scholastic Assessment Test)
ACT (American College Testing)
Critical Thinking Assessment Test (CAT)
Watson-Glaser Critical Thinking Appraisal
California Critical Thinking Skills Test (CCTST)
CLA+ (Collegiate Learning Assessment)
California Bar Exam’s performance test section
Certain civil service exams
Some corporate hiring assessments

These exams use stimulus-based questions to evaluate a candidate’s ability to analyze information, identify logical flaws, draw valid conclusions, and evaluate arguments. The questions present a short paragraph or scenario followed by a question and multiple-choice answers.