Logical Reasoning - Logical Deduction

Why Logical Reasoning Logical Deduction?

In this section you can learn and practice Logical Reasoning Questions based on "Logical Deduction" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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Where can I get Logical Reasoning Logical Deduction Interview Questions and Answers (objective type, multiple choice)?

Here you can find objective type Logical Reasoning Logical Deduction questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided.

How to solve Logical Reasoning Logical Deduction problems?

You can easily solve all kind of Logical Reasoning questions based on Logical Deduction by practicing the objective type exercises given below, also get shortcut methods to solve Logical Reasoning Logical Deduction problems.

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. Read the conclusion and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.

Give answer:

  • (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.

1. 

Statements: No women teacher can play. Some women teachers are athletes.

Conclusions:

  1. Male athletes can play.
  2. Some athletes can play.

A. Only conclusion I follows
B. Only conclusion II follows
C. Either I or II follows
D. Neither I nor II follows
E. Both I and II follow

Answer: Option D

Explanation:

Since one premise is negative, the conclusion must be negative. So, neither conclusion follows.

Read: Important Rules and Formulas for Logical Deduction.


2. 

Statements: All bags are cakes. All lamps are cakes.

Conclusions:

  1. Some lamps are bags.
  2. No lamp is bag.

A. Only conclusion I follows
B. Only conclusion II follows
C. Either I or II follows
D. Neither I nor II follows
E. Both I and II follow

Answer: Option C

Explanation:

Since the middle term 'cakes' 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.

3. 

Statements: All mangoes are golden in colour. No golden-coloured things are cheap.

Conclusions:

  1. All mangoes are cheap.
  2. Golden-coloured mangoes are not cheap.

A. Only conclusion I follows
B. Only conclusion II follows
C. Either I or II follows
D. Neither I nor II follows
E. Both I and II follow

Answer: Option B

Explanation:

Clearly, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No mango is cheap'. Since all mangoes are golden in colour, we may substitute 'mangoes' with 'golden-coloured mangoes'. Thus, II follows.

4. 

Statements: Some kings are queens. All queens are beautiful.

Conclusions:

  1. All kings are beautiful.
  2. All queens are kings.

A. Only conclusion I follows
B. Only conclusion II follows
C. Either I or II follows
D. Neither I nor II follows
E. Both I and II follow

Answer: Option D

Explanation:

Since one premise is particular, the conclusion must be particular. So, neither I nor II follows.

5. 

Statements: Some doctors are fools. Some fools are rich.

Conclusions:

  1. Some doctors are rich
  2. Some rich are doctors.

A. Only conclusion I follows
B. Only conclusion II follows
C. Either I or II follows
D. Neither I nor II follows
E. Both I and II follow

Answer: Option D

Explanation:

Since both the premises are particular, no definite conclusion follows.




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