logo

CuriousTab

CuriousTab

Discussion

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

  • Statements: All doors are buses. All buses are leaves. No leaf is a flower.

    Conclusions:

    1. No flower is a door.
    2. No flower is a bus.
    3. Some leaves are doors.
    4. Some leaves are buses.


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

  • Correct Answer
  • All follow 

    Explanation
    IV is the converse of the second premise and so it holds.

    All doors are buses. All buses are leaves.

    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 doors are leaves'. III is the converse of this conclusion and so it holds.

    All buses are leaves. No leaf is a flower.

    Since both the premises are universal and one premise is negative, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No bus is flower'. II is the converse of this conclusion and so it holds.

    All doors are buses. No bus is flower.

    As discussed above, it follows that 'No door is flower'. I is the converse of this conclusion and so it also holds.

    More questions

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

    • Options
    • A. couch
    • B. rug
    • C. table
    • D. chair
      • Discuss
    • 3. Which word does NOT belong with the others?

    • Options
    • A. eel
    • B. lobster
    • C. crab
    • D. shrimp
      • Discuss
    • 4. 14 14 26 26 38 38 50

    • Options
    • A. 60 72
    • B. 50 62
    • C. 50 72
    • D. 62 62
    • E. 62 80
      • Discuss
    • 5. All guilty politicians were arrested. Kishan and Chander were among those arrested.

    • Options
    • A. All politicians are guilty.
    • B. All arrested people are politicians.
    • C. Kishan and Chander were not politicians.
    • D. Kishan and Chander were guilty.
      • Discuss
    • 6. Statement: Is caste-based reservation policy in professional colleges justified?

      Arguments:

      1. Yes. The step is a must to bring the underprivileged at par with the privileged ones.
      2. No. It obstructs the establishment of a classless society.
      3. Yes. This will help the backward castes and classes of people to come out of the oppression of upper caste people.


    • Options
    • A. Only I and II are strong
    • B. Only II is strong
    • C. Only II and III are strong
    • D. Only I and III are strong
    • E. All are strong
      • Discuss
    • 7. Statement: 'Guests should be provided lunch.' - A tells B.

      Assumptions:

      1. Unless told, lunch may not be provided.
      2. Guests will stay during lunch time.


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

    • Options
    • A. dodge
    • B. flee
    • C. duck
    • D. avoid
      • Discuss
    • 9. Statement: Should agriculture in rural India be mechanized?

      Arguments:

      1. Yes. It would lead to higher production.
      2. No. Many villagers would be left unemployed.


    • Options
    • A. Only argument I is strong
    • B. Only argument II is strong
    • C. Either I or II is strong
    • D. Neither I nor II is strong
    • E. Both I and II are strong
      • Discuss
    • 10. 28 25 5 21 18 5 14

    • Options
    • A. 11 5
    • B. 10 7
    • C. 11 8
    • D. 5 10
    • E. 10 5
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.