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Logical Deduction Online Quiz
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.
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.
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: No man is beggar. All men are rich.
Conclusions:
I. No beggar man is rich.
II. No rich man is beggar.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : D
Explanation
The first statement is an E-type proposition, so, the intermediate term 'man' forming the subject is distributed. The second statement is an A-type proposition. So, the intermediate term 'men' forming the subject is distributed. Since the intermediate term is distributed twice, the conclusion cannot be broad. Since one statement is not positive, the conclusion must not be positive. Thus, it is valid that 'Some rich men are not beggar'. Thus, 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 3 - Statements: All markers are chalks. All chairs are chalks.
Conclusions:
I. Some marker are chairs.
II. Some chalks are marker.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : B
Explanation
Since the intermediate term 'chalks' is not distributed even once in the statements, no definite conclusion is valid. However, conclusion II is the opposite of the first statement and so 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 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.
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: 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.
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 brinjals are bananas. All bananas are pumpkins.
Conclusions:
I. Some brinjals are pumpkins.
II. All pumpkins are brinjals.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : A
Explanation
Some brinjals are definitely pumpkins because some brinjals are bananas and all bananas are pumpkins. But conclusion II is not on the cards. Hence, 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 7 - Statements: All dolls are mirrors. All bottles are mirrors. All bikes are bottles.
Conclusions:
I. All bikes are mirrors.
II. Some mirrors are bikes.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : E
Explanation
Both conclusion I and II are true. Hence, option E is chosen.
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 lizards are mangoes. Some mangoes are streets. All streets are mountains.
Conclusions:
I. Some mountains are mangoes.
II. Some mountains are lizards.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : A
Explanation
Some mountains are mangoes is the only possible answer. But some mountains are lizards is not correct. Hence, 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 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.
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 clothes are cottons. Some cotton is bags.
Conclusions:
I. No cloth is a bag.
II. All cottons are bags.
III. Some bags are clothes.
IV. No cottons is a cloth.
Options:
Answer : D
Explanation
None of the above conclusions holds true. Hence option D is correct.