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: Every boy is a student. Every student is inexperienced.

Conclusions:

I. Every boy is inexperienced.

II. Some inexperienced are students.

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

'Every' is equivalent to 'All'. Since both the statements are broad and affirmative, the conclusion must be broad and affirmative and should not contain the intermediate term. So, conclusion I is valid. 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 2 - Statements: All lions are tigers. Some tigers are horses.

Conclusions:

I. Some horses are lions.

II. No horse is lion.

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

There is equal chance for both the conclusions to happen. Some horses are lions and no horse is lion has 50% chance. 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 3 - Statements: Some cold drinks are toxic. Some toxic are hazardous.

Conclusions:

I. All cold drinks are hazardous.

II. No cold drinks are hazardous.

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

We are not sure whether all cold drinks are hazardous is true or no cold drinks are hazardous is true but the chances of occurrence of both the options is equally likely 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 4 - Statements: All Pepsi are tasty. All tasty are healthy.

Conclusions:

I. Some healthy are Pepsi.

II. Some healthy are tasty.

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 the options are correct. So, 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 5 - Statements: All boys are smokers. Some smokers are lovers.

Conclusions:

I. All smokers are boys.

II. Some lovers are not smokers.

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 the intermediate term 'smokers' is not distributed even once in the statements, 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 6 - Statements: All women are mothers. All mothers are sisters.

Conclusions:

I. All women are sisters.

II. Some women are not sisters.

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

As all women are mothers and all mothers are sisters then we can directly infer that all women are sisters. Hence, conclusion I is correct. But conclusion II is not correct. Hence, option A is the answer.

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: Some boys are brave. All brave are celebrities.

Conclusions:

I. Some celebrities are boys.

II. All celebrities 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 : A

Explanation

Only option A is correct. Because some celebrities are boys is possible. But conclusion II is not possible.

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 ellipses are eggs. No egg is hyperbola. All hyperbolas are parabola.

Conclusions:

I. There is a possibility that all eggs can be parabola.

II. Some ellipse are definitely not hyperbola.

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

Clearly there is possibility that all eggs can be parabola because no egg is hyperbola and all hyperbolas are parabola. Also option II is correct because no egg is hyperbola and some ellipses are eggs. So, some ellipses are definitely not be hyperbola holds true good. Hence, both the options are correct.

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

Q 10 - Statements: Some bullets are guns. Some guns are beads. All beads are rings.

Conclusions:

I. Some rings are guns.

II. Some guns are bullets.

III. Some rings are bullets.

Options:

A - I is valid

B - II is valid

C - Both I and II are valid

D - III is valid

Answer : C

Explanation

II is the opposite of first statement and so I holds true.

Some bullets are guns. Some guns are beads.

Since both the statements are particular, no definite conclusion can be drawn. Some guns are beads. All beads are rings. Since one statement is particular; conclusion must not contain any middle term. So, it is valid that 'Some guns are rings'. I is the opposite of this conclusion and so it holds true. Some bullets are guns. Some guns are rings. Since both the statements are particular, no definite conclusion can be drawn.


reasoning_logical_deduction.htm

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