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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: 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.
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.
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 papers are pens. Some pencils are pens.
Conclusions:
I. Some pens are pencils.
II. Some pens are papers.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : E
Explanation
Since both statements are particular, no definite conclusion is valid. However, conclusion I is the opposite of second statement, while conclusion II is the opposite of the first statement. So, both of them hold 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: No women are donkey. Madhuri is a women.
Conclusions:
I. Madhuri is not a donkey.
II. All women are not Madhuri
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 not positive, the conclusion must not be positive. Conclusion II cannot follow as it contains 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 5 - Statements: All snakes are trees. All trees are cats.
Conclusions:
I. All snakes are cats.
II. All cats are snakes.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : A
Explanation
Since both the statements are broad and affirmative, the conclusion must be broad and affirmative. II conclusion being affirmative, distributes the term 'cats'.
Since the term 'cats' is distributed in II without being distributed in any of the statements, so conclusion II cannot follow. Thus, 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 6 - Statements: All grasses are trees. No tree is shrub
Conclusions:
I. No grasses are shrubs.
II. Some shrubs are grasses.
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 not positive, the conclusion must not be positive. So, conclusion II cannot 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 bakes are cakes. All lamps are cakes.
Conclusions:
I. Some lamps are bakes.
II. No lamp is bakes.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : C
Explanation
Either I or II is correct. Hence, option C 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 trees are roots. No root is branch.
Conclusions:
I. No branch is tree.
II. Some branches are trees.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : A
Explanation
As all trees are roots and no root is branch, we can deduce that no branch is tree. 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 heroes are brave. All braves are fair.
Conclusions:
I. Some braves are heroes.
II. No braves is heroes.
III. Some fair are heroes.
IV. All fair are heroes.
Options:
Answer : C
Explanation
Clearly, it is valid that 'All heroes are fair'. I is the opposite of the first statement, while III is the opposite of II statement. So, both I and III holds true.
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:
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.
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