Logical Deduction Online Quiz


Advertisements

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: 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: All educated people read newspapers. Stan does not read newspaper.

Conclusions:

I. Stan is not educated.

II. Reading newspaper is not essential to be educated.

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 one statement is not positive, the conclusion must be broad but not positive and should not contain the intermediate term. So, only conclusion 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: Most teachers are boys. Some boys are principals.

Conclusions:

I. Some principals are boys.

II. Some teachers are principals.

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 particular, no definite conclusion is valid. However, conclusion I is the opposite of the second 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 5 - Statements: All scientists are fair. All fair persons are strong.

Conclusions:

I. All scientists are strong.

II. Some strong peoples are fair.

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

As all scientists are fair and all fair persons are strong, all scientists are fair and strong indeed. So statement I holds true. Similarly as all fair persons are strong that means some strong persons are fair. Hence conclusion II also holds true.

In each of 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 hunks are girls. Some girls are writers.

Conclusions:

I. All girls are hunks.

II. Some girls are not writers.

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 conclusions 1 and 2 contain the intermediate term 'girls', so none of them can 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 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: All pots are toys. Some toys are hills. Some demons are hills.

Conclusions:

I. Some demons are toys.

II. Some hills are pots.

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

Neither conclusion I nor II is true. Hence, option D 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
Advertisements