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: No bat is ball. No ball is stump.

Conclusions:

I. No bat is stump.

II. All stumps are bats

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 not positive, 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 2 - Statements: All bags are chocos. All lamps are chocos.

Conclusions:

I. Some lamps are bags.

II. No lamp is bag.

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 : C

Explanation

Since the intermediate term 'chocos' is not distributed even once in the statements, no definite conclusion is valid. However, I and II involve only the extreme terms and form a complementary pair. So, either I or II 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: All poles are pillars. Some boats are not poles.

Conclusions:

I. All pillars are boats.

II. Some boats are not pillars.

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

Clearly, the term 'pillars' is distributed in both the conclusions without being distributed in any of the statements. So, 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 4 - Statements: Some tabs are windows. All windows are laptops.

Conclusions:

I. Some laptops are tabs.

II. All laptops are tabs.

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

Only option A is correct. Because some laptops are tabs but all laptops cannot be tabs. So, option A 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 sands are pebbles. Some pebbles are rocks.

Conclusions:

I. Some rocks are sand.

II. Some pebbles are sand.

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

Conclusion II is valid. 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 8 - Statements: Some books are ants. Some ants are pillows. No dog is pillow.

Conclusions:

I. There is possibility that some dogs are ants.

II. Some dogs are definitely books.

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

Surely there is possibility that some dogs are ants. But we cannot say that some dogs are definitely books. Hence, option A 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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