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

  • Statements: Some bricks are trees. All trees are pens. All pens are boats.

    Conclusions:

    1. Some boats are bricks.
    2. Some pens are bricks.
    3. Some trees are bricks.
    4. Some bricks are boats.


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

  • Correct Answer
  • All follow 

    Explanation
    III is the converse of the first premise and so it holds.

    Some bricks are trees. All trees are pens.

    Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some bricks are pens'. II is the converse of this conclusion and so it holds.

    All trees are pens. All pens are boats.

    Since both the premises are universal and affirmative, the conclusion must be universal affirmative and should not contain the middle term. So, it follows that 'All trees are boats'.

    Some bricks are trees. All trees are boats.

    Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some bricks are boats'. Thus, IV follows. I is the converse of this conclusion and so it also holds.

    More questions

    • 1. Which word does NOT belong with the others?

    • Options
    • A. cornea
    • B. retina
    • C. pupil
    • D. vision
      • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 8 12 9 13 10 14 11

    • Options
    • A. 14 11
    • B. 15 12
    • C. 8 15
    • D. 15 19
    • E. 8 5
      • Discuss
    • 9. Statement: The government has decided to hold the employers responsible for deducting tax at source for all its employees.

      Assumptions:

      1. The employers may still not arrange to deduct tax at source for its employees.
      2. The employees may not allow the employers to deduct tax at source.


    • Options
    • A. Only assumption I is implicit
    • B. Only assumption II is implicit
    • C. Either I or II is implicit
    • D. Neither I nor II is implicit
    • E. Both I and II are implicit
      • Discuss
    • 10. Statement: Mr. X, an active member of the Union, often insults his superiors in the office with his rude behaviour.

      Courses of Action:

      1. He should be transferred to some other department.
      2. The matter should be referred to the Union.


    • 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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