GMAT Question of the Day (April 28): Coordinate Geometry and Critical Reasoning

By - Apr 28, 02:00 AM Comments [0]

Math (PS)

If a circle passes through points (1, 2) , (2, 5) , and (5, 4) , what is the diameter of the circle?

(A) \sqrt{18}
(B) \sqrt{20}
(C) \sqrt{22}
(D) \sqrt{26}
(E) \sqrt{30}

Question Discussion & Explanation
Correct Answer - B - (click and drag your mouse to see the answer)

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Verbal (CR)

Dr. Sheila Porter plans to run an experiment using nursing students. Each student will be shown either a pleasant nature film or a disturbing horror film. Each student will be observed by someone who—looking only at the student's facial expressions—must ascertain which film is being shown. Students shown the horror movie are told to hide their feelings in order to convince the observer that they are watching a pleasant film. Dr. Porter hypothesizes that all the students in the experiment who are convincing will be among the best at working with patients. The hypothesis will be tested by comparing the convincing students and unconvincing students in terms of their performance with patents.

Which one of the following incidents best illustrates Dr. Porter's hypothesis?

(A) Niles, the most convincing student in the experiment, later went on to become a physician.
(B) After graduating, Yoshiro, a nursing student who was convincing in the experiment, helped care for Bram, a patient at a hospital. Bram recovered from his operation.
(C) After graduating, Kim, a nursing student in the experiment who watched the nature film, was removed from the staff of a hospital for unacceptable performance in patient care.
(D) Daria, a nursing student who was convincing in the experiment, later received "A's" in those classes in which working with patients in a teaching hospital was the sole basis of her grades.
(E) Marite, a nursing student who was not convincing in the experiment, later quit nursing school.

Question Discussion & Explanation
Correct Answer - D - (click and drag your mouse to see the answer)

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