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Practice Test 6 - LSAT Logical Reasoning

20 questions. Answer them in any order, then submit to see your score and every explanation.

  1. Which one of the following, if true, most seriously weakens the argument?
  2. A restaurant replaced its paper menus with QR-code menus. After the change, the average time between seating and ordering fell by 6 minutes. At the same time, the restaurant reduced its menu size by removing several slow-selling items. Since a smaller menu can make decisions easier and faster, the owner concludes that the QR-code menus did not significantly speed up ordering; the reduced menu did. Therefore, if the restaurant restores the larger menu while keeping QR-code menus, ordering times will return to their previous level. The answer to which one of the following questions would be most helpful in evaluating the argument?​
  3. A museum director argues that the museum should extend weekend hours. Last month, when the museum stayed open late for a special event, attendance increased sharply. The director infers that later hours cause higher attendance. Since higher attendance increases gift-shop revenue, and increased revenue helps fund new exhibits, extending weekend hours will help fund new exhibits. The pattern of reasoning above is most similar to that in which one of the following?
  4. Which of the following most closely parallels the reasoning in the argument above?
  5. A hospital compared two months of data and found that after it introduced a new hand-sanitizer dispenser at each patient-room door, the rate of hospital-acquired infections declined. The hospital also observed that staff members used sanitizer more frequently because the dispensers were easier to access. Since increased sanitizer use reduces the spread of germs, the new dispenser placement caused the infection decline. Therefore, any hospital that installs dispensers at each room door will reduce hospital-acquired infections. Which one of the following is an assumption on which the argument depends?
  6. Which one of the following most closely parallels the flawed reasoning in the argument?
  7. The conclusion follows logically if which one of the following is assumed?
  8. A company's annual report states that its average employee salary increased this year compared with last year. Yet the company's human-resources summary indicates that most employees received either no raise or only a very small raise, and several departments report that wages for entry-level positions were frozen. The company did not reduce benefits in lieu of pay, and both documents are based on the same payroll records. Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above?
  9. The two speakers are committed to disagreeing about which of the following?
  10. Which one of the following principles, if valid, most justifies the mayor's decision?
  11. Engineer Malik: The city should replace aging water pipes with plastic composites because they resist corrosion and last longer than metal in acidic soil. Yes, the upfront cost is higher, but fewer leaks mean lower repair costs and less roadwork over time. You mentioned microplastics, yet these pipes are sealed and carry pressurized water, so shedding is negligible compared with everyday plastic waste. Activist Rowan: "Negligible" is speculation; the composites degrade under heat and pressure, and once particles enter drinking water, removal is costly. Even if leaks decline, we will be locked into a material we cannot easily recycle at end of life. Metal pipes can be relined and reused, so their long-term footprint is smaller. The point at issue between the two speakers is whether…
  12. Which one of the following assumptions permits the conclusion above to be properly drawn?
  13. Speaker 1, Hospital Administrator,
    Our hospital should adopt an AI tool to flag abnormal radiology images for a second look. It would not replace radiologists; it would simply prioritize cases that need urgent review. Studies at comparable hospitals show fewer missed findings when such tools are used alongside human judgment. Even if the software occasionally overflags, the cost of extra review is outweighed by preventing dangerous oversights.
    Speaker 2, Senior Radiologist,
    We should not adopt that AI tool. Overflagging will flood us with false alarms and delay attention to truly urgent scans. Moreover, the studies you cite were done with different patient populations, so we cannot assume similar results here. Improving staffing and training would reduce missed findings without introducing opaque software. The hospital administrator and the senior radiologist disagree about which one of the following?
  14. Which of the following best describes the method of reasoning in the spokesperson's argument?
  15. A restaurant owner claims that replacing paper menus with QR-code menus will increase customer satisfaction. She notes that most recent complaints mention slow service, and that servers currently spend time explaining daily specials and collecting menu questions. With QR-code menus, customers can view specials instantly and send questions through the ordering app, freeing servers to deliver food more quickly. Therefore, she concludes that QR-code menus will increase customer satisfaction. Her argument relies on the idea that addressing the main source of complaints will necessarily raise overall satisfaction. Which one of the following, if assumed, allows the conclusion of the argument to be properly drawn?
  16. Which one of the following most closely parallels the reasoning in the argument above?
  17. A doctor is punished for a bad outcome despite following standard care. Which principle best challenges this?
  18. A homeowner argues that the neighborhood's recent rise in property values proves that the new community garden is a success. The garden opened shortly before the rise began. Also, the homeowner says, successful neighborhood projects are those that increase residents' pride, and increased pride typically leads homeowners to maintain their properties better. Better-maintained properties raise property values. Therefore, since values rose after the garden opened, the garden is a success. The pattern of reasoning in the argument above is most similar to that in which one of the following?
  19. A charity reports that donors who receive handwritten thank-you notes are more likely to donate again the following year than donors who receive only an email receipt. The charity's director reasons that handwritten notes make donors feel more appreciated, which encourages repeat giving. Therefore, the director concludes that switching to handwritten notes for all donors will significantly increase the charity's total donations next year. Which one of the following, if true, casts the most doubt on the conclusion above?
  20. Which of the following most closely parallels the reasoning in the argument above?

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