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: Some kangaroos are chimpanzees. No chimpanzee is Dinosaur.

Conclusions:

I. All kangaroos are chimpanzees.

II. Some dinosaurs are kangaroos.

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

None of the conclusions is true. 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: All lovers are singers. All film directors are lovers

Conclusions:

I. All film directors are singers.

II. Some lovers are film directors.

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

Since both the statements are broad and affirmative, the conclusion must be broad affirmative and should not contain the intermediate term. So, conclusion I is valid. Conclusion II is the opposite of the second statement and so it also holds true.

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: All windows are panes. No pane is wall.

Conclusions:

I. No window is wall.

II. No wall is pane.

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

Since both the statements are broad and one statement is not positive, the conclusion must be broad but not positive. Also, the conclusion should not contain the intermediate term. So, I is valid. However, conclusion II is the opposite of the second statement and thus it also holds true.

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: Some hens are crows. All crows are horses.

Conclusions:

I. Some horses are hens.

II. Some hens are horses.

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

Since one statement is particular, conclusion must not contain any middle term. So, II is valid. Conclusion I is the opposite of conclusion II and so it also holds true.

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: No women scientist can play. Some women scientists are athletes.

Conclusions:

I. Male athletes can play.

II. Some athletes can play.

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 one statement is not positive, the conclusion must not be positive. So, none of the 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 7 - Statements: Some bananas are trees. All trees are pens. All pens are boats.

Conclusions:

I. Some boats are bananas.

II. Some pens are bananas.

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 conclusion I and II follow. 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 8 - Statements: All lizards are mangoes. Some mangoes are streets. All streets are mountains.

Conclusions:

I. Some mountains are mangoes.

II. Some mountains are lizards.

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

Some mountains are mangoes is the only possible answer. But some mountains are lizards is not correct. Hence, 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 9 - Statements: Some rings are circles. Some circles are globes.

Conclusions:

I. There is possibility that some rings are globes.

II. All globes are circles.

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

There is 100% possibility that some rings are globes. But all globes can never be circles. So, conclusion I is true but II is false.

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

Q 10 - Statements: Some sumps are caps. All caps are bats. Some tigers are caps.

Conclusions:

I. Some bats are tigers.

II. Some sumps are bats.

III. All bats are caps.

Options:

A - I is valid

B - II is valid

C - III is valid

D - I and II are valid

Answer : D

Explanation

Some saints are caps. All caps are bats.

Since one statement is particular, the conclusion must be particular and should not contain the intermediate term. So, it is valid that 'Some sumps are bats'. Thus, II is valid. Some tigers are caps. All caps are bats. So, it is valid that 'Some tigers are bats'. I is the opposite of this conclusion and so it holds true.


reasoning_logical_deduction.htm

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