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

  • Statements: All benches are desks. Some desks are roads. All roads are pillars.

    Conclusions:

    1. Some pillars are benches.
    2. Some pillars are desks.
    3. Some roads are benches.
    4. No pillar is bench.


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

  • Correct Answer
  • Only either I or IV, and II follow 

    Explanation
    All benches are desks. Some desks are roads.

    Since the middle term 'desks' is not distributed even once in the premises, no definite conclusion follows.

    Some desks are roads. All roads are pillars.

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

    All benches are desks. Some desks are pillars.

    Since the middle term 'desks' is not distributed even once in the premises, no definite conclusion follows. However, I and IV involve the extreme terms and form a complementary pair. So, either I or IV follows.

    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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