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

Reasoning Aptitude > Logical Reasoning

LOGICAL DEDUCTION MCQs

Total Questions : 508 | Page 48 of 51 pages

Question 471. Statements : All roads are poles. No pole is a house.
Conclusions :
I. Some roads are houses.
II. Some houses are poles.

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 both the premises are universal and one premise is negative, the conclusion must be universal negative. So, neither I nor II follows.

Question 472. Statements : No bat is ball. No ball is wicket.
Conclusions :
I. No bat is wicket.
II. All wickets are bats.

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 both the premises are negative, no definite conclusion follows.

Question 473. Statements : All flowers are trees. No fruit is tree.
Conclusions :
I. No fruit is flower.
II. Some trees are flowers.

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
As discussed above, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No flower is fruit'. I is the converse of this conclusion and thus it follows. II is the converse of the first premise and so it also holds.

Question 474. Statements : All good athletes win. All good athletes eat well.
Conclusions :
I. All those who eat well are good athletes.
II. All those who win eat well.

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 'good athletes' is distributed twice in the premises, the conclusion must be particular and should not contain the middle term. So it follows that 'Some of those who win, eat well'.

Question 475. Statements :All jungles are tigers. Some tigers are horses.
Conclusions :
I. Some horses are jungles.
II. No horse is jungle.

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

Question 476. Statements : All hill stations have a sun-set point. X is a hill station.
Conclusions :
I. X has a sun-set point.
II. Places other than hill stations do not have sun-set points.

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 and should not contain the middle term. So, only I follows.

Question 477. Statements : Some dreams are nights. Some nights are days.
Conclusions :
I. All days are either nights or dreams.
II. Some days are nights.

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 particular, no definite conclusion follows. However, II is the converse of the second premise and thus it holds.

Question 478. Statements : All film stars are playback singers. All film directors are film stars.
Conclusions :
I. All film directors are playback singers.
II. Some film stars are film directors.

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 both the premises are universal and affirmative, the conclusion must be universal affirmative and should not contain the middle term. So, I follows. II is the converse of the second premise and so it also holds.

Question 479. Statements : All windows are doors. No door is wall.
Conclusions :
I. No window is wall.
II. No wall is door.

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 both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, I follows. However, II is the converse of the second premise and thus it also holds,

Question 480. Statements : Most teachers are boys. Some boys are students.
Conclusions :
I. Some students are boys.
II. Some teachers are students.

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 particular, no definite conclusion follows. However, I is the converse of the second premise and thus it holds.