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Home Logical Reasoning Logical Deduction See What Others Are Saying!
  • Question
  • Statements: All aeroplanes are trains. Some trains are chairs.

    Conclusions:

    1. Some aeroplanes are chairs.
    2. Some chairs are aeroplanes.
    3. Some chairs are trains.
    4. Some trains are aeroplanes.


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

  • Correct Answer
  • Only III and IV follow 

    Explanation
    Since the middle term 'trains' is not distributed even once in the/premises, no definite conclusion follows. However, III is the converse of the second premise while IV is the converse of the first premise. So, both of them hold.

  • 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. Statements: Some dreams are nights. Some nights are days.

      Conclusions:

      1. All days are either nights or dreams.
      2. Some days are nights.


    • 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
    • 3. Statement: Why don't you invite Anthony for the Christmas party this year?

      Assumptions:

      1. Anthony is not from the same city.
      2. Unless invited Anthony will not attend the party.


    • 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
    • 4. Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

    • Options
    • A. (1/3)
    • B. (1/8)
    • C. (2/8)
    • D. (1/16)
    • Discuss
    • 5. book

    • Options
    • A. fiction
    • B. pages
    • C. pictures
    • D. learning
    • Discuss
    • 6. 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
    • 7. Statements: Some tigers are lions. Some lions are rabbits. Some rabbits are horses.

      Conclusions:

      1. Some tigers are horses.
      2. Some rabbits are tigers.
      3. Some horses are lions.
      4. All horses are rabbits.


    • Options
    • A. All follow
    • B. None follows
    • C. Only I and II follow
    • D. Only II and IV follow
    • E. Only IV follows
    • Discuss
    • 8. Which word does NOT belong with the others?

    • Options
    • A. branch
    • B. dirt
    • C. leaf
    • D. root
    • Discuss
    • 9. pain

    • Options
    • A. cut
    • B. burn
    • C. nuisance
    • D. hurt
    • Discuss
    • 10. champion

    • Options
    • A. running
    • B. swimming
    • C. winning
    • D. speaking
    • Discuss


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