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Logical Problems MCQs for MDCAT Practice

Logical Reasoning section, Logical Problems chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 312 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    When I want to use my computer, • loading my email program takes 1 minute; • loading my word-processing software takes 2 minutes; • loading my music program takes 3 minutes; • initializing the virus protection takes 3 minutes; • checking the hard disk takes 4 minutes. My computer can do up to three things at a time, but once it has begun doing something it carries on until it has finished it. What is the shortest possible time before all of these tasks are completed?
    • 4 minutes
    • 6 minutes
    • 7 minutes
    • 5 minutes (correct answer)
    Correct answer: D
    Optimize task scheduling to minimize completion time by parallel processing, considering task durations and system concurrency limits.
  2. Question 2
    If 2 pencils cost 8 rupees, how many can you buy with 40 rupees?
    • 8
    • 10 (correct answer)
    • 12
    • 16
    Correct answer: B
    This question tests your ability to solve simple ratio and proportion problems, a common application of logical reasoning in quantitative scenarios.
  3. Question 3
    I went 10m to the East from my house, then turned north and walked another 15m, and then I turned west and covered 12m, and then turned south and covered 15m. How far am I from my house?
    • 0 m
    • 1 m
    • 2 m (correct answer)
    • 3 m
    Correct answer: C
    This problem tests directional reasoning and displacement calculation, requiring students to track movement on a 2D plane to find the net distance from the origin.
  4. Question 4
    If + means , / means -, means / and - means +, what will be the value of 4 + 11 / 5 - 55 = ?
    • -48.5
    • -11
    • 79
    • 94 (correct answer)
    Correct answer: D
    Decode mathematical expressions by substituting new operators and solve using the correct order of operations (BODMAS/PEMDAS).
  5. Question 5
    My digital alarm clock shows two digits for the hour and two digits for the minutes. It works normally, except that the alarm sounds and wakes me up every time at least 3 consecutive digits are the same (e.g. at 04:44). Nothing else disturbs me during the night, and each time I am woken up I go straight back to sleep. When I go to bed, the alarm clock shows 22:00 and I set the alarm for 07:15. How long is my longest period of uninterrupted sleep?
    • 20 minutes
    • 71 minutes
    • 98 minutes
    • 80 minutes (correct answer)
    Correct answer: D
    Calculate the longest uninterrupted sleep by identifying time intervals when the alarm won't trigger due to repeating digits.
  6. Question 6
    Passage: A, B, C, D, and E are five friends. A is shorter than B but taller than E. C is the tallest. D is shorter than B and taller than A. Who has two persons taller and two persons shorter than him/her?
    • A
    • B
    • C
    • D (correct answer)
    Correct answer: D
    This question tests your ability to logically deduce relative positions in a linear ordering based on comparative statements, a common skill in logical reasoning sections.
  7. Question 7
    “This is the way, Jess,” said my father, pointing with his cane across the deep valley below us. “I want to show you something you’ve not seen for many years!” “Isn’t it too hot for you to do much walking?” I wiped the streams of sweat from my face to keep them from stinging my eyes. I didn’t want to go with him. I had just finished walking a half mile uphill from my home to his. I had carried a basket of dishes to Mom. There were two slips in the road and I couldn’t drive my car and I knew how hot it was. It was 97 in the shade. I knew that from January until April my father had gone to eight different doctors. One of the doctors had told him to get a taxi to take him home. But my father walked home five miles across the mountain and told my Mom what the doctor had said. Forty years ago, a doctor had told him the same thing. And he had lived to raise a family of five children. He had done so much hard work in those years as any man. Q. The narrator has ______ siblings.
    • five
    • six
    • none
    • four (correct answer)
    Correct answer: D
    This question tests careful reading and identification of key details within a narrative passage to infer familial relationships.
  8. Question 8
    Passage: There is a family of six persons G, J, B, E, T and Z. Their professions are teacher, writer, actor, singer, dancer and lawyer but not respectively in the same order. G is a teacher. Z is a dancer. B is neither writer nor actor. E is neither singer nor lawyer. T is an actor. J is a lawyer. Who among them has a profession of lawyer?
    • J (correct answer)
    • B
    • E
    • T
    Correct answer: A
    This logical reasoning problem tests direct inference from given statements about family members and their professions. It requires careful deduction to identify the lawyer.

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Read the full Logical Problems chapter notes: Logical Problems notes. Or browse every chapter.