New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    In each question below are given three statements followed by three conclusions numbered I, II and II. You have to take the three 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 two given statements, disregarding commonly known facts.

    Statements: No triangle is a cuboid. Some

    cuboids are pentagons. All hexagons are cuboids. Conclusions: I. At least some pentagons are triangles. II. No hexagon is a cuboid. III. Some pentagons are cuboids.
    A Only I follow Correct Answer Incorrect Answer
    B Only II and III follow Correct Answer Incorrect Answer
    C Only I and II follow Correct Answer Incorrect Answer
    D All I, II and III follow Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    No triangle is a cuboid(E) + Some cuboids are pentagons(I) ⇒ Some pentagons are not triangles(O*). Hence conclusion I does not follow. All hexagons are cuboids(A) ⇒ I.I ⇒ Some hexagons are cuboids(I). Hence conclusion II does not follow. Some cuboids are pentagons(I) ⇒ Conversion ⇒ Some pentagons are cuboids(I). Hence conclusion III follows.

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