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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: Some sticks are drums. Some drums are heavy.
Conclusions:
I. All heavy are either drums or sticks.
II. Some heavy are drums.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : B
Explanation
Option I is not correct because both the statements are particular, so no definite conclusion can be ascertained but II conclusion 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 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.
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 trucks are handles. All cups are handles.
Conclusions:
I. All cups are trucks.
II. Some handles are not cups.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : D
Explanation
Both the statements are A type propositions. So, in either, the intermediate term 'handles' forming the significance is not distributed. Since the intermediate term 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 5 - Statements: All mobiles are roads. All roads are calls.
Conclusions:
I. All calls are mobiles.
II. Some calls are mobiles.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : B
Explanation
From the statement ’all roads are calls’ and ‘all mobiles are roads’, we can deduce that ‘some calls are mobiles’ but ‘ all calls are mobiles’ is certainly not on the cards. Hence, option B is correct.
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..
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 bananas are trees. All trees are pens. All pens are boats.
Conclusions:
I. Some boats are bananas.
II. Some pens are bananas.
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 follow. Hence, 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 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, 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 greens are ripe. All ripe are mango.
Conclusions:
I. All greens are definitely mango.
II. There is a possibility that all mangoes are green.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : E
Explanation
Both the conclusions are true. As all greens are ripe and all ripe are mango, hence, all green are definitely mango. Conclusion II also holds true. This is because there is a clear possibility that all mangoes are green.
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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