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

  • Statements: No house is school. All colleges are schools. All schools are teachers.

    Conclusions:

    1. No house is teacher.
    2. All colleges are teachers.
    3. Some teachers are not houses.
    4. No college is house.


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

  • Correct Answer
  • Only II, III and IV follow 

    Explanation
    All colleges are schools. No house is school.

    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 college is house'. Thus, IV follows.

    All colleges are schools. All schools are teachers.

    Clearly, it follows that 'All colleges are teachers'. Thus, II follows.

    No house is school. All schools are teachers.

    Since the middle term 'schools' is distributed twice, the conclusion must be particular.

    Since one premise is negative, the conclusion must be negative. So, it follows that 'Some teachers are not houses'.

    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

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