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 lady teacher can play. Some lady teachers are sportsperson.

Conclusions:

I. Male sportsperson can play.

II. Some sportsperson 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 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 hard workers win. All hard workers eat well.

Conclusions:

I. All those who eat well are hard workers.

II. All those who win eat well.

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 get to any conclusion. All those who eat well are hard workers and all those who win eat well cannot be 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 3 - Statements: Some papers are pens. Ink is a paper.

Conclusions:

I. Ink is not a pen.

II. Ink is a pen.

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 'papers' 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. 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 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: Some desks are caps. No cap is black.

Conclusions:

I. Some caps are desks.

II. No desk is black.

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 one statement is particular and the other statement is not positive, the conclusion must be particular but not positive and should not contain the intermediate term. So, it is valid that 'Some desks are not black'. However, conclusion I is the opposite of the first statement and thus it 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: 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 apples are green in colour. No green-coloured things are cheap.

Conclusions:

I. All apples are cheap.

II. Green-colored apples are not cheap.

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

Clearly, the conclusion must be broad but not positive and should not contain the intermediate term. So, it is valid that 'No apple is cheap'. Since all apples are green in colour, we may substitute apples with 'golden-colored apples. Thus, 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 8 - Statements: All bacteria are amoeba. No fish is amoeba. Some amoebas are fungi.

Conclusions:

I. There is possibility that some fishes are amoeba.

II. Some bacteria are fish.

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

Option A is correct because surely there is possibility that some fishes are amoeba. But some bacteria are fish is not possible. Hence, option A is correct.

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

Q 9 - Statements: All buses are trains. Some trains are cars.

Conclusions:

I. Some buses are cars.

II. Some cars are buses.

III. Some cars are trains.

IV. Some trains are buses.

Options:

A - IV is valid

B - III is valid

C - Both III and IV are valid

D - All are valid

E - Both I and II are valid.

Answer : E

Explanation

Since the intermediate term 'trains' is not distributed even once in the statements, no definite conclusion is valid. However, III is the opposite of the second statement while IV is the opposite of the first statement. So, both of them holds true.

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

Q 10 - Statements: Some computers are TVs. Some TVs are radios.

Conclusions:

I. Some computers are radios.

II. Some radios are computers.

III. All radios are TVs.

IV. All TVs are computers.

Options:

A - I is valid

B - II is valid

C - Both I or II are valid

D - None of the above is valid

Answer : D

Explanation

None of the above conclusions are having mere possibilities of becoming true. Hence, option D is correct.

reasoning_logical_deduction.htm
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