Question

    In each question below are given three statements followed by three conclusions numbered I, II and III. You have to take the two given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the three given statements, disregarding commonly known facts.

    Statements:           All eleven are twelve.

    Some twelve are thirteen. 

    All thirteen are fourteen

    Conclusions:         I. Some thirteen are eleven.

                                    II. Some fourteen are twelve.

                                    III. No eleven is a thirteen.

    A Either I or II and III follows Correct Answer Incorrect Answer
    B Either I or III and II follows Correct Answer Incorrect Answer
    C Only II and III follows Correct Answer Incorrect Answer
    D None follows Correct Answer Incorrect Answer

    Solution

    All eleven are twelve (A) + Some twelve are thirteen(I) ⇒ No conclusion. Hence, conclusion I will not follow but it will form a complementary pair with conclusion III. Some twelve are thirteen(I) + All thirteen are fourteen(A) ⇒ Some fourteen are twelve (I). Hence, conclusion II will follow

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