100+ Logical Reasoning Questions and Answers for Competitive Exams - 2

Question: 6

In each questions below are given two statements followed by two conclusions numbered I and II.
Statements :
All pens are chalks. All chairs are chalks.
Conclusions :
I. Some pens are chairs.
II. Some chalks are pens.

(A) if only conclusion I follows

(B) if only conclusion II follows

(C) if either conclusion I or II follows

(D) if neither conclusion I nor II follows

(E) if both conclusions I and II follow

Ans: B

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: 7

In each questions below are given two statements followed by two conclusions numbered I and II.
Statements :
No magazine is cap. All caps are cameras.
Conclusions :
I. No camera is magazine.
II. Some cameras are magazines.

(A) if only conclusion I follows

(B) if only conclusion II follows

(C) if either conclusion I or II follows

(D) if neither conclusion I nor II follows

(E) if both conclusions I and II follow

Ans: C

As discussed above, the conclusion must be particular negative and should not contain the middle term. So, it follows that ‘Some cameras are not magazines’. However, I and II involve only the extreme terms and form a complementary pair. Thus, either I or II follows.

Question: 8

In each questions below are given two statements followed by two conclusions numbered I and II.
Statements :
All men are dogs. All dogs are cats
Conclusions :
I. All men are cats.
II. All cats are men.

(A) if only conclusion I follows

(B) if only conclusion II follows

(C) if either conclusion I or II follows

(D) if neither conclusion I nor II follows

(E) if both conclusions I and II follow

Ans: A

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 goat. Since the term goats is distributed in II without being distributed in any of the premises, so conclusion II cannot follow. Thus, only I follows.

Question: 9

In each questions below are given two statements followed by two conclusions numbered I and II.
Statements :
All jungles are tigers. Some tigers are horses.
Conclusions :
I. Some horses are jungles.
II. No horse is jungle.

(A) if only conclusion I follows

(B) if only conclusion II follows

(C) if either conclusion I or II follows

(D) if neither conclusion I nor II follows

(E) if both conclusions I and II follow

Ans: C

Since the middle term tiger 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: 10

In each questions below are given two statements followed by two conclusions numbered I and II.
Statements :
All tubes are handles. All cups are handles.
Conclusions :
I. All cups are tubes.
II. Some handles are not cups.

(A) if only conclusion I follows

(B) if only conclusion II follows

(C) if either conclusion I or II follows

(D) if neither conclusion I nor II follows

(E) if both conclusions I and II follow

Ans: D

Both the premises are A type propositions. So, in either, the middle term handles forming the predicate is not distributed. Since the middle term is not distributed even once in the premises, no definite conclusion follows.

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