Logical Deduction Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Logical Deduction. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 1 - Statements: All oceans are waters. Some waters are boats.

Conclusions:

I. Some boats are oceans.

II. All waters are boats

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : D

Explanation

We cannot say that some boats are oceans and also all waters cannot be boats, hence, neither of the options is valid. Hence, option D is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 2 - Statements: No man is beggar. All men are rich.

Conclusions:

I. No beggar man is rich.

II. No rich man is beggar.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : D

Explanation

The first statement is an E-type proposition, so, the intermediate term 'man' forming the subject is distributed. The second statement is an A-type proposition. So, the intermediate term 'men' forming the subject is distributed. Since the intermediate term is distributed twice, the conclusion cannot be broad. Since one statement is not positive, the conclusion must not be positive. Thus, it is valid that 'Some rich men are not beggar'. Thus, none of the conclusions is valid.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 3 - Statements: Many trams are trucks. All trucks are trains.

Conclusions:

I. Some trams are trains.

II. No truck is a tram.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : A

Explanation

Since the first statement is particular, conclusion must not contain any middle term. Thus, only I is valid.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 4 - Statements: All men are foodie. Some men are cook.

Conclusions:

I. Some foodies are cooks.

II. Some cooks are foodie.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : E

Explanation

Both the options are correct. Some foodies are cooks and some cooks are foodie, both holds true. Hence, option E is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 5 - Statements: All snakes are trees. All trees are cats.

Conclusions:

I. All snakes are cats.

II. All cats are snakes.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : A

Explanation

Since both the statements are broad and affirmative, the conclusion must be broad and affirmative. II conclusion being affirmative, distributes the term 'cats'.

Since the term 'cats' is distributed in II without being distributed in any of the statements, so conclusion II cannot follow. Thus, only I is valid.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 6 - Statements: All bandages are garlic. All garlic are cakes.

Conclusions:

I. All cakes are bandages.

II. Some cakes are bandages.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : B

Explanation

All cakes cannot be bandages if we look at the statements. But some cakes are definitely bandages. Hence, option B is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 7 - Statements: Some monkeys are fools. Some fools are rich.

Conclusions:

I. Some monkeys are rich.

II. Some rich are monkeys.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : D

Explanation

Since both the statements are particular, no definite conclusion is valid.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 8 - Statements: Some blankets are covers. All covers are papers. All papers are bags.

Conclusions:

I. Some bags are blankets.

II. Some papers are blankets.

Options:

A - Only conclusion I is correct.

B - Only conclusion II is correct.

C - Either I or II is correct.

D - Neither I nor II is correct.

E - Both I and II are correct.

Answer : E

Explanation

Both the conclusions are correct in this regard. Hence, option E is correct.

The following question are given with some conclusions. Choose the options that logically follow the most.

Q 9 - Statements: Some bags are pockets. No pocket is a packet.

Conclusions:

I. No bag is a packet.

II. Some bags are not pouches.

III. Some pockets are bags.

IV. No pocket is a bag.

Options:

A - I is valid

B - II is valid

C - Both II and III are valid

D - All are valid

Answer : C

Explanation

Since one statement is particular and the other is not positive, the conclusion must be particular but not positive and should not contain the intermediate term. So, II is valid. III is the opposite of the first statement and thus it also holds true.

The following question are given with some conclusions. Choose the options that logically follow the most.

Q 10 - Statements: Some canals are streams. Some streams are deserts. All deserts are roads.

Conclusions:

I. Some roads are streams.

II. Some roads are canals.

III. Some deserts are canals.

Options:

A - I is valid

B - II is valid

C - III is valid

D - All are valid

Answer : B

Explanation

Some canals are streams. Some streams are deserts. Since both the statements are particular, no definite conclusion is valid. Some streams are deserts. All deserts are roads. Conclusion II is particular because of sentence.

reasoning_logical_deduction.htm
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