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Home ‣ Logical Reasoning ‣ Logical Deduction See What Others Are Saying!
  • Question

  • Statements: All pencils are birds. All birds are skies. All skies are hills.

    Conclusions:

    1. All pencils are hills.
    2. All hills are birds
    3. All skies are pencils.
    4. All birds are hills.


  • Options
  • A. Only I and II follow
  • B. Only I and III follow
  • C. Only III and IV follow
  • D. All follow
  • E. None of these

  • Correct Answer
  • None of these 

    Explanation
    All pencils are birds. All birds are skies.

    Since both the premises are universal and affirmative, the conclusion must be universal affirmative (A-type) and should not contain the middle term. So, it follows that 'All pencils are skies'.

    All birds are skies. All skies are hills.

    As discussed above, it follows that 'All birds are hills'. Thus, IV follows.

    All pencils are skies. All skies are hills.

    Clearly, it follows that 'All pencils are hills'. Thus, I follows.

    Hence, I and IV follow.

    More questions

    • 1. PSYCHOLOGIST : NEUROSIS

    • Options
    • A. ophthalmologist : cataract
    • B. dermatologist : fracture
    • C. infant : pediatrician
    • D. rash : orthopedist
    • E. oncologist : measles
      • Discuss
    • 2. Optimist is to cheerful as pessimist is to

    • Options
    • A. gloomy
    • B. mean
    • C. petty
    • D. helpful
      • Discuss
    • 3. Statements: Death keeps no calendar.

      Conclusions:

      1. Man must die one day.
      2. Death can come at any time.


    • Options
    • A. Only conclusion I follows
    • B. Only conclusion II follows
    • C. Either I or II follows
    • D. Neither I nor II follows
    • E. Both I and II follow
      • Discuss
    • 4. Which word does NOT belong with the others?

    • Options
    • A. cornea
    • B. retina
    • C. pupil
    • D. vision
      • Discuss
    • 5. Many business offices are located in buildings having two to eight floors. If a building has more than three floors, it has a lift.

    • Options
    • A. All floors may be reached by lifts.
    • B. Only floors above the third floor have lifts.
    • C. Seventh floors have lifts.
    • D. Second floors do not have lifts.
      • Discuss
    • 6. Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two:

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 7. Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two:

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 8. Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two:

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 9. Statements: National Aluminium Company has moved India from a position of shortage to self-sufficiency in the metal.

      Conclusions:

      1. Previously, India had to import aluminium.
      2. With this speed, it can soon become a foreign exchange earner.


    • Options
    • A. Only conclusion I follows
    • B. Only conclusion II follows
    • C. Either I or II follows
    • D. Neither I nor II follows
    • E. Both I and II follow
      • Discuss
    • 10. Statement: Footpaths of a busy road are crowded with vendors selling cheap items.

      Courses of Action:

      1. The help of police should be sought to drive them away.
      2. Some space should be provided to them where they can earn their bread without blocking footpaths.


    • Options
    • A. Only I follows
    • B. Only II follows
    • C. Either I or II follows
    • D. Neither I nor II follows
    • E. Both I and II follow
      • Discuss

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