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 kings are queens. All of the queens are beautiful.

Conclusions:

I. All kings are beautiful.

II. All queens are kings.

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 particular, the conclusion must be particular. 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 2 - Statements: All hill stations have a stiff. X is a hill station.

Conclusions:

I. X has a stiff.

II. Places other than hill stations do not have stiffs.

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 and should not contain the intermediate term. So, 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 3 - Statements: Businessman marries only intelligent girls. Tosa is very intelligent.

Conclusions:

I. Tosa will marry a bureaucrat.

II. Tosa will not marry a bureaucrat.

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

The data does not mention whether all intelligent girls are married to Businessman. So, either I or II may follow.

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 books are bibles. Some bibles are mirrors.

Conclusions:

I. Some mirrors are books.

II. No book is mirror.

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

Both the statements are particular so no definite conclusion is valid. Here occurrence of both the conclusions is equally likely. Thus, 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 5 - Statements: All boys are honest. Dravid is honest.

Conclusions:

I. Dravid is a boy.

II. All honest persons are boys.

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 can neither conclude that ‘Dravid is a boy’ nor ‘all honest persons are boys’. 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 6 - Statements: Some boats are pilgrims. All pilgrims are pious.

Conclusions:

I. All pious are pilgrims.

II. Some boats are pious.

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

From the statement ‘all pilgrims are pious’ and ‘some boats are pilgrims’ we can get that ‘some boats are pious definitely’. So conclusion II is definitely true. But conclusion I is not true. Hence, option B.

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: All plates are bamboo. Some bamboos are balls. No bowl is a ball.

Conclusions:

I. Some bowls are bamboo.

II. No bowl is bamboo.

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

From the above statements, it is clear that there are equal chances that some bowls are bamboo and no bowl is bamboo. Hence, option C 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 giraffes are camels. Some camels are tigers. No tigers are lions.

Conclusions:

I. Some lions are camels.

II. There is possibility of some goats to be lions.

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

Yes, there are definitely possibilities of some goats to be lions. But some lions are camels are not true. 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 9 - Statements: Some rubbers are windows. Some windows are pencils. All pencils are boxes.

Conclusions:

I. Some windows are boxes.

II. Some rubbers are boxes.

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 rubbers are boxes is not possible. We cannot say forcefully that some rubbers are boxes but some windows are boxes because some windows are pencils and all pencils are boxes. Hence, option A is correct.

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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