Logical Reasoning Questions for MCA, MBA Exams - 1
Question: 1
In each question below are given two statements followed by two conclusions numbered I and II. You have to take the given two statements to be true even if they seem to be at variance from commonly known facts.
Statements :
All dresses are shoes.
II. No shoe is brown.
Conclusions :
I. No dresses are brown.
II. Some shoes are dresses.
(A) If only conclusion I follows
(B) If only conclusion II follows
(C) If either I or II follows
(D) If neither I nor II follows and
(E) If both I and II follow
Ans: A
Since one premise is negative, the conclusion must be negative. So, only conclusion I follows.
Question: 2
Statements :
I. All boys are honest.
II. Sachin is a boy.
Conclusions :
I. Sachin is a boy.
II. All honest persons are boys.
(A) If only conclusion I follows
(B) If only conclusion II follows
(C) If either I or II follows
(D) If neither I nor II follows and
(E) If both I and II follow
Ans: D
Both the premises are A type propositions. So, the middle term ‘honest’ forming the predicate in each is not distributed in either.
Since the middle term is not distributed even once, no conclusion follows.
Question: 3
Statements :
Some kites are horses.
II. All horses are dogs.
Conclusions :
I. All dogs are horses.
II. Some dogs are horses.
(A) If only conclusion I follows
(B) If only conclusion II follows
(C) If either I or II follows
(D) If neither I nor II follows and
(E) If both I and II follow
Ans: D
None of the conclusions follows as both contain the middle term.
Question: 4
Statements :
All roads are poles.
II. No pole is house.
Conclusions :
I. Some roads are houses.
II. Some houses are poles.
(A) If only conclusion I follows
(B) If only conclusion II follows
(C) If either I or II follows
(D) If neither I nor II follows and
(E) If both I and II follow
Ans: D
Since one premise is negative, the conclusion must be negative. So, neither conclusion follows.
Question: 5
Statements :
I. Some aeroplanes are living beings.
II. Some non living beings are ghosts.
Conclusions :
I. Some aeroplanes are ghosts.
II. Some aeroplanes are not ghosts.
(A) If only conclusion I follows
(B) If only conclusion II follows
(C) If either I or II follows
(D) If neither I nor II follows and
(E) If both I and II follow
Ans: D
Since both the premises are particular, no conclusion follows.
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