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  • Question
  • Statements: Some mountains are hillocks. Some mountains are rivers. Some mountains are valleys.

    Conclusions:

    1. All mountains are either hillocks or rivers or valleys.
    2. No valley is river.
    3. Some river are valleys.


  • Options
  • A. None follows
  • B. Only I follows
  • C. Only either II or III follows
  • D. Only III follows
  • E. None of these

  • Correct Answer
  • Only either II or III follows 

    Explanation
    Since each combination of premises shall contain two particular premises, no definite conclusion can be drawn. However, II and III are statements involving the extreme terms of the last two premises and form a complementary pair. Thus, either II or III follows.

    Logical Deduction problems


    Search Results


    • 1. Statements: All trains are buses. No room is bus. All boats are rooms.

      Conclusions:

      1. No boat is train.
      2. No bus is boat.
      3. No train is room.


    • 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
    • 2. Statements: Some pens are books. All schools are books. Some colleges are schools.

      Conclusions:

      1. Some colleges are pens.
      2. Some pens are schools.
      3. Some colleges are books.


    • 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
    • 3. Statements: Some saints are balls. All balls are bats. Some tigers are balls.

      Conclusions:

      1. Some bats are tigers.
      2. Some saints are bats.
      3. All bats are balls.


    • Options
    • A. Only I and II follow
    • B. Only II follows
    • C. Only I and III follow
    • D. Only III follows
    • E. None of these.
    • Discuss
    • 4. 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
    • 5. 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
    • 6. Statements: Some blades are hammers. Some hammers are knives. Some knives are axes.

      Conclusions:

      1. Some axes are hammers.
      2. Some knives are blades.
      3. Some axes are blades.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only II follows
    • D. Only III follows
    • E. None of these
    • Discuss
    • 7. Statements: Some boxes are hammers. Some hammers are beads. All beads are rings.

      Conclusions:

      1. Some rings are hammers.
      2. Some hammers are boxes.
      3. Some rings are boxes.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only I and II follow
    • D. Only II and III follow
    • E. All follow
    • Discuss
    • 8. Statements: Some blankets are beds. Some pillows are blankets. All beds are pillows.

      Conclusions:

      1. Some blankets are pillows.
      2. Some pillows are beds.
      3. Some beds are blankets.


    • Options
    • A. Only either I or II follows
    • B. Only I and either II or III follow
    • C. Only III and either I or II follow
    • D. All I, II and III follow
    • E. None of these
    • Discuss
    • 9. Statements: All dolls are windows. All bottles are windows. All cars are bottles.

      Conclusions:

      1. All cars are windows.
      2. Some cars are dolls.
      3. Some windows are cars.


    • 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: All tigers are lions. No cow is lion. Some camels are cows.

      Conclusions:

      1. Some lions are camels.
      2. No camel- is tiger.
      3. Some tigers are cows.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only II follows
    • D. Only III follows
    • E. Either I or II follows
    • Discuss


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