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  • Question
  • Statements: Some houses are offices. Some offices are schools.

    Conclusions:

    1. Some schools are houses.
    2. Some offices are houses.
    3. No house is school.
    4. Some schools are offices.


  • Options
  • A. Only II and III follow
  • B. Only I and IV follow
  • C. Only either III or IV, and I follow
  • D. Only II and IV and either I or III follow.

  • Correct Answer
  • Only II and IV and either I or III follow. 

    Explanation
    Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. So, either I or III follows. II is the converse of the first premise while IV is the converse of the second premise. Thus, both of them hold.

  • Logical Deduction problems


    Search Results


    • 1. Statements: Some bottles are drinks. All drinks are cups.

      Conclusions:

      1. Some bottles are cups.
      2. Some cups are drinks.
      3. All drinks are bottles.
      4. All cups are drinks.


    • Options
    • A. Only I and II follow
    • B. Only II and III follow
    • C. Only II and IV follow
    • D. Only III and IV follow
    • E. Only I and IV follow
    • Discuss
    • 2. Statements: Some books are pens. No pen is pencil.

      Conclusions:

      1. Some pens are books.
      2. Some pencils are books.
      3. Some books are not pencils.
      4. All pencils are books.


    • Options
    • A. Only I follows
    • B. Only II and III follow
    • C. Only I and III follow
    • D. Only I and II follow
    • Discuss
    • 3. Statements: All terrorists are guilty. All terrorists are criminals.

      Conclusions:

      1. Either all criminals are guilty or all guilty are criminals.
      2. Some guilty persons are criminals.
      3. Generally criminals are guilty.
      4. Crime and guilt go together.


    • Options
    • A. Only I follows
    • B. Only I and III follow
    • C. Only II follows
    • D. Only II and IV follow
    • Discuss
    • 4. Statements: Some tables are TVs. Some TVs are radios.

      Conclusions:

      1. Some tables are radios.
      2. Some radios are tables.
      3. All radios are TVs.
      4. All TVs are tables.


    • Options
    • A. None follows
    • B. All follow
    • C. Only I and III follow
    • D. Only II and IV follow
    • Discuss
    • 5. Statements: Some clothes are marbles. Some marbles are bags.

      Conclusions:

      1. No cloth is a bag.
      2. All marbles are bags.
      3. Some bags are clothes.
      4. No marble is a cloth.


    • Options
    • A. Only either I or IV follows
    • B. Only either I or II follows
    • C. None follows
    • D. Only either I or III follows
    • Discuss
    • 6. Statements: Some taxis have horns. Some taxis have lights.

      Conclusions:

      1. Every taxi has either horn or light.
      2. Some taxis have neither light nor horn.
      3. Some taxis have horns as well as lights.
      4. No taxi has horn as well as light.


    • Options
    • A. Only I and II follow
    • B. Only II and III follow
    • C. Only II and IV follow
    • D. Either III or IV follows
    • E. All follow
    • Discuss
    • 7. Statements:

      All fruits are vegetables. All pens are vegetables. All vegetables are rains.

      Conclusions:

      1. All fruits are rains.
      2. All pens are rains.
      3. Some rains are vegetables.


    • Options
    • A. None follows
    • B. Only I and II follow
    • C. Only II and III follow
    • D. Only I and III follow
    • E. All follow
    • Discuss
    • 8. Statements: Some towels are brushes. No brush is soap. All soaps are rats.

      Conclusions:

      1. Some rats are brushes.
      2. No rat is brush.
      3. Some towels are soaps.


    • Options
    • A. None follows
    • B. Only either I or II follows
    • C. Only II follows
    • D. Only I and III follow
    • E. None of these
    • Discuss
    • 9. Statements: Some pictures are frames. Some frames are idols. All idols are curtains.

      Conclusions:

      1. Some curtains are pictures.
      2. Some curtains are frames.
      3. Some idols are frames.


    • Options
    • A. Only I and II follow
    • B. Only II and III follow
    • C. Only I and III follow
    • D. All follow
    • E. None of these
    • Discuss
    • 10. Statements: Some hills are rivers. Some rivers are deserts. All deserts are roads.

      Conclusions:

      1. Some roads are rivers.
      2. Some roads are hills.
      3. Some deserts are hills.


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


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