syllogism questions and answers


Question 1:

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

          Statements:

          1.Some dancers are writers.

          2.All writers are students.

          Conclusions:

          I. Some students are dancers.

          II. Some students are writers.

          III. No student is a dancer.

          (A) Only conclusions II and III follow.

          (B) Only conclusions I and II follow.

          (C) All conclusions I, II and III follow.

          (D) Either conclusion I or III follows.

Answer:

B

Solution:

Given statements can be drawn as shown below in the venn-diagram:

 


Question 2:

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follows from the statements.

Statements:

I. No A is B.

II. All C and D

III. Some C and B.

Conclusions:

I. Some D are B.

II. Some B are C.

III. All C are B.

A. Both conclusions I and II follow.

B. Both conclusions I and III follow.

C. Only conclusion III follows.

D. Only conclusion II follows.

Answer:

A

Solution:

Given statements can be drawn as shown below in the venn-diagram:

 


Question 3:

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion logically follows from the statements.

Statements:

I. Some red are rat.

II. Some rat are wild.

Conclusions:

I. Some wild are rat.

II. All wild are rat.

III. Some red are wild.

A. None of the conclusion follows.

B. Only conclusion I follows.

C. Only conclusion III follows.

D. Only conclusion II follows.

Answer:

B

Solution:

Given statements can be drawn as shown below in the venn-diagram:

 


Question 4:

Statements and two conclusions I and II are given below. Supposing statement as fact, while it seems different from general fact.

Statements:

All birds are long.

Some long are peacock.

Conclusion I : Some birds are peacock.

Conclusion II: Some peacock are long.

Decide, which option is following logically.

(A) Both conclusion I and II follows

(B) Neither conclusion I nor conclusion II follows.

(C) Only conclusion I follows

(D) Only conclusion II follows

A. A
B. D
C. B
D. C

Answer:

B

Solution:

Given statements can be drawn as shown below in the venn-diagram:

 


Question 5:

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow s from the statements.

Statements:

I. No A is B.

II. All C are B.

Conclusions:

I. No C is A.

II. Some A are C.

A. Only conclusion I follows.

B. Both conclusions I and II follow.

C. None of the conclusions follows.

D. Only conclusion II follows.

Answer:

A

Solution:

Given statements can be drawn as shown below in the venn-diagram:

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