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

Reasoning Aptitude > Logical Reasoning

LOGICAL DEDUCTION MCQs

Total Questions : 508 | Page 43 of 51 pages

Question 421. Statements : All pens are chalks. All chairs are chalks.
Conclusions :
I. Some pens are chairs.
II. Some chalks are pens.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option B. -> Only conclusion II follows
Since the middle term 'chalks' is not distributed even once in the premises, no definite conclusion follows. However, II is the converse of the first premise and so it holds.

Question 422. Statements : Some men are educated. Educated persons prefer small families.
Conclusions :
I. All small families are educated.
II. Some men prefer small families.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option B. -> Only conclusion II follows
Since one premise is particular, the conclusion must be particular and should not contain the middle term. Thus, only II follows.

Question 423. Statements : All educated people read newspapers. Rahul does not read newspaper.
Conclusions :
I. Rahul is not educated.
II. Reading newspaper is not essential to be educated.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option A. -> Only conclusion I follows
Since both the premises are universal and one premise is negative, the conclusion must be universal negative and should not contain the middle term. So, only I follows.

Question 424. Statements : Some engineers are fools. Anand is an engineer.
Conclusions :
I. Some fools are engineers.
II. Anand is a fool.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option A. -> Only conclusion I follows
Since the middle term 'engineer' is not distributed even once in the premises, no definite conclusion follows. However, I is the converse of the first premise and thus it holds.

Question 425. Statements : Bureaucrats marry only intelligent girls. Tanya is very intelligent.
Conclusions :
I. Tanya will marry a bureaucrat.
II. Tanya will not marry a bureaucrat.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option C. -> Either I or II follows
The data does not mention whether all intelligent girls are married to bureaucrats. So, either I or II may follow.

Question 426. Statements : Raman is always successful. No fool is always successful.
Conclusions :
I. Raman is a fool.
II. Raman is not a fool.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option B. -> Only conclusion II follows
Since both the premises are universal and one premise is negative, the conclusion must be universal negative and should not contain the middle term. So, only II follows.

Question 427. Statements : Some desks are caps. No cap is red.
Conclusions :
I. Some caps are desks.
II. No desk is red.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option A. -> Only conclusion I follows
Since one premise is particular and the other premise is negative, the conclusion must be particular negative and should not contain the middle term. So, it follows that 'Some desks are not red'. However, I is the converse of the first premise and thus it holds.

Question 428. Statements : All water is divine. All temples are divine.
Conclusions :
I. All water is temple.
II. All temples are water.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option D. -> Neither I nor II follows
Since the middle term 'divine' is not distributed even once in the premises, no definite conclusion can be drawn.

Question 429. Statements : All men are dogs. All dogs are cats.
Conclusions :
I. All men are cats.
II. All cats are men.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option A. -> Only conclusion I follows
Since both the premises are universal and affirmative, the conclusion must be universal affirmative. However, conclusion II, being an A-type proposition, distributes the term 'cats'.
Since the term 'cats' is distributed in II without being distributed in any of the premises, so conclusion II cannot follow. Thus, only I follows.

Question 430. Statements : Some hens are cows. All cows are horses.
Conclusions :
I. Some horses are hens.
II. Some hens are horses.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Discuss Question

Answer: Option E. -> Both I and II follow
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, II follows. I is the converse of II and so it also holds.