Logical Deduction(Reasoning Aptitude > Logical Reasoning ) Questions and answers for exam Preparation

Reasoning Aptitude > Logical Reasoning

LOGICAL DEDUCTION MCQs

Total Questions : 508 | Page 45 of 51 pages

Question 441. Statements : Some tigers are lions. Some lions are rabbits. Some rabbits are horses.
Conclusions :
I. Some tigers are horses.
II. Some rabbits are tigers.
III. Some horses are lions.
IV. All horses are rabbits.

Discuss Question

Answer: Option B. -> None follows
Since each combination of premises shall contain two particular premises, no definite conclusion can be drawn.

Question 442. Statements : No tree is fruit. All fruits are stones. All stones are rains.
Conclusions :
I. No stone is tree.
II. No rain is tree.
III. Some rains are fruits.
IV. Some rains are trees.

Discuss Question

Answer: Option C. -> Only either II or IV, and III follow
No tree is fruit. All fruits are stones.
Since the middle term 'fruits' is distributed twice, the conclusion must be particular.
Since one premise is negative, the conclusion must be negative. So, it follows that 'Some stones are not trees'.
All fruits are stones. All stones are rains. Clearly, it follows that 'All fruits are rains'. III is the converse of this conclusion and so it holds.
No tree is fruit, All fruits are rains. As discussed above, the conclusion must be particular negative and should not contain the middle term. So, it follows that 'Some rains are not trees'. However, II and IV involve only the extreme terms and form a complementary pair. Thus, either II or IV follows.

Question 443. Statements : Some spoons are bowls. All bowls are knives. All knives are forks.
Conclusions :
I. All spoons are forks.
II. All bowls are forks.
III. Some knives are bowls.
IV. Some forks are spoons.

Discuss Question

Answer: Option E. -> None of these
III is the converse of the second premise and so it holds.
Some spoons are bowls. All bowls are knives.
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some spoons are knives'.
All bowls are knives. All knives are forks.
Since both the premises are universal and affirmative, the conclusion must be universal affirmative and should not contain the middle term. So, it follows that.
'All bowls are forks'. Thus, II follows.
Some spoons are knives. All knives are forks.
Since one premise is particular, the conclusion must be particular and should not contain the middle term.
So, it follows that 'Some spoons are forks'. IV is the converse of this conclusion and so it follows.
Hence, II, III and IV follow.

Question 444. Statements : All players are spectators. Some spectators are theatres. Some theatres are dramas.
Conclusions :
I. Some dramas are spectators.
II. Some players are dramas.
III. Some theatres are players.
IV. All spectators are players.

Discuss Question

Answer: Option A. -> None follows
All players are spectators. Some spectators are theatres.
Since the middle term 'spectators' is not distributed even once in the premises, no definite conclusion follows.
Some spectators are theatres. Some theatres are dramas.
Since both the premises are particular, no definite conclusion follows.

Question 445. Statements : All pencils are birds. All birds are skies. All skies are hills.
Conclusions :
I. All pencils are hills.
II. All hills are birds
III. All skies are pencils.
IV. All birds are hills.

Discuss Question

Answer: Option E. -> None of these
All pencils are birds. All birds are skies.
Since both the premises are universal and affirmative, the conclusion must be universal affirmative (A-type) and should not contain the middle term. So, it follows that 'All pencils are skies'.
All birds are skies. All skies are hills.
As discussed above, it follows that 'All birds are hills'. Thus, IV follows.
All pencils are skies. All skies are hills.
Clearly, it follows that 'All pencils are hills'. Thus, I follows. Hence, I and IV follow.

Question 446. Statements : Some bags are pockets. No pocket is a pouch.
Conclusions :
I. No bag is a pouch.
II. Some bags are not pouches.
III. Some pockets are bags.
IV. No pocket is a bag,

Discuss Question

Answer: Option C. -> Only II and III follow
Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. So, II follows. III is the converse of the first premise and thus it also holds.

Question 447. Statements : All aeroplanes are trains. Some trains are chairs.
Conclusions :
I. Some aeroplanes are chairs.
II. Some chairs are aeroplanes.
III. Some chairs are trains.
IV. Some trains are aeroplanes.

None follows
Only I and II follow
Only II and III follow
Only III and IV follow

Discuss Question

Answer: Option D. -> Only III and IV follow
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.

Question 448. Statements : Some clothes are marbles. Some marbles are bags.
Conclusions :
I. No cloth is a bag.
II. All marbles are bags.
III. Some bags are clothes.
IV. No marble is a cloth.

Only either I or IV follows
Only either I or II follows
None follows
Only either I or III follows

Discuss Question

Answer: Option D. -> Only either I or III follows
Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. Thus, either I or III follows.

Question 449. Statements : All politicians are honest. All honest are fair.
Conclusions :
I. Some honest are politicians.
II. No honest is politician.
III. Some fair are politicians.
IV. All fair are politicians.

None follows.
Only I follows.
Only I and II follow.
Only I and III follow

Discuss Question

Answer: Option D. -> Only I and III follow
Clearly, it follows that 'All politicians are fair'. I is the converse of the first premise, while III is the converse of the above conclusion. So, both I and III hold.

Question 450. Statements : Some tables are TVs. Some TVs are radios.
Conclusions :
I. Some tables are radios.
II. Some radios are tables.
III. All radios are TVs.
IV. All TVs are tables.

Discuss Question

Answer: Option A. -> None follows
Since both the premises are particular, no definite conclusion follows.