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 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: 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: Some cakes are toffees. All toffees are chocolates.

Conclusions:

I. Some chocolates are toffees.

II. Some toffees are not cakes.

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, conclusion must not contain any middle term. Thus, it is valid that 'Some toffees are chocolates'. Conclusion I is the opposite of the second statement and so it holds true. Since both the statements are affirmative, the conclusion cannot be negative. Thus, II does not follow.

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: 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 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: All bags are tables. All lamps are tables.

Conclusions:

I. Some lamps are bags.

II. No lamp is bag.

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 'tables' is not distributed even once in the statements, no definite conclusion is valid. However, I and II conclusions involve only the extreme terms and form a complementary pair. So, either I or II is valid.

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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