Logical Deductions MCQs for MDCAT Practice

Logical Reasoning section, Logical Deductions chapter. Sample questions from past PMC papers.

1. Question 1
   The set of all real numbers under the usual multiplication operation is not a group because?
   • A.zero has no inverse.
   • B.Identity element does not exist.
   • C.Multiplication is not associative.
   • D.Both A and B.
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2. Question 2
   Statements: All boys are honest. Sachin is honest. Conclusions: 1. Sachin is a boy. 2. All honest persons are boys.
   • A.Only conclusion I follows
   • B.Only conclusion II follows
   • C.Either I or II follows
   • D.Neither I nor II follows
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3. Question 3
   Fact-Checking.Fact 1: Pictures can tell a story.Fact 2: All storybooks have a picture. Fact 3: Some storybooks have words. If the above three statements are facts, then which of the following statement will also be a fact?I. Pictures can tell a story better than words can. II. The stories in storybooks are simple.Ill. Some storybooks have both pictures and words.
   • A.Only I
   • B.Only II
   • C.Only III
   • D.None of them is a fact
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4. Question 4
   The use of aversive conditioning techniques is ethically justified in treating certain psychological disorders:
   • A.Disagree
   • B.Slightly disagree
   • C.Neutral
   • D.Slightly agree
   • E.Agree
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5. Question 5
   Statements: All chocolates are tasty. No tasty thing is healthy. Conclusions: I. No chocolate is healthy. II. Some tasty things are healthy.
   • A.Only I
   • B.Only II
   • C.Both
   • D.Neither I nor II
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6. Question 6
   If all roses are flowers and some flowers fade quickly, which of the following is correct?
   • A.All roses fade quickly
   • B.Some roses fade quickly
   • C.Some flowers may not be roses
   • D.No rose fades quickly
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7. Question 7
   Statements: l. All cups are pencils.II. Some pencils are pens.Conclusions: I. Some pencils are cups. II. No pencils are cups. III. Some cups are pens.
   • A.Only conclusion (I) follows
   • B.Only conclusion (II) follows
   • C.Both I and III follow
   • D.Neither conclusion follows
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8. Question 8
   Statement 1: John runs faster than George. Statement 2: Tom runs faster than John. Statement 3: George runs faster than Tom. If 1 and 2 are true, statement 3 is:
   • A.True
   • B.False
   • C.Uncertain
   • D.None of the above
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