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  3. 10th Class
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  5. Logical Reasoning

10th Class Mental Ability Logical Reasoning Question Bank Logic

  • question_answer
    Direction: In each of the following questions two statements are given followed by two three or four conclusions numbered I, II, III, and IV. You have to take the given statements to be true even if they seem to be at variance from the commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
    Statements: Some horses are mammals. Some mammals are dogs. Conclusions:            
    I. Some dogs are horses.
    II. Some mammals are horses.
    III. No horse is dog.
    IV. Some dogs are mammals.

    A) Only II and III follow

    B) Only I and IV follow

    C) Only either III or IV, and I follow

    D) Only II and IV and either I or III follow.

    E) All of follow

    Correct Answer: D

    Solution :

    Explanation Option [d] is correct. Since both the premises are particular, no definite conclusion follow. However, I and III involve only the extreme terms and form a complementary pair. So, either I or III follows. II is the converse of the first premise while IV is the converse of the second premise. Thus, both of them hold.


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