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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: 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.
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 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: Many trams are trucks. All trucks are trains.
Conclusions:
I. Some trams are trains.
II. No truck is a tram.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is correct.
Answer : A
Explanation
Since the first statement is particular, conclusion must not contain any middle term. 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 4 - Statements: All men are foodie. Some men are cook.
Conclusions:
I. Some foodies are cooks.
II. Some cooks are foodie.
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 options are correct. Some foodies are cooks and some cooks are foodie, both holds true. 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 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: Some boats are pilgrims. All pilgrims are pious.
Conclusions:
I. All pious are pilgrims.
II. Some boats are pious.
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 pilgrims are pious and some boats are pilgrims we can get that some boats are pious definitely. So conclusion II is definitely true. But conclusion I is not true. Hence, option B.
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 mangoes are shiny. No shiny things are cheap.
Conclusions:
I. All mangoes are cheap.
II. Shiny mangoes are not cheap.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is 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 mango is cheap'. Since all mangoes are shiny, we may substitute 'mangoes' with shiny mangoes'. Thus, conclusion 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 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 shoes are black. No black things are cheap.
Conclusions:
I. All shoes are cheap.
II. Black shoes are not cheap.
Options:
A - Only conclusion I is correct.
B - Only conclusion II is correct.
C - Either I or II is 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 shoes is cheap'. Since all shoes are black, we may substitute 'shoes' with black shoes'. Thus, II is valid.
The following question are given with some conclusions. Choose the options that logically follow the most.
Q 10 - Statements: Some cats are rats. All rats are trees. Some trees are not cats.
Conclusions:
I. Some trees are cats.
II. All cats are trees.
III. All rats are cats.
IV. No tree is cats.
Options:
Answer : A
Explanation
Some cats are rats. All rats are trees.
Since one statement is particular, conclusion must not contain any middle term. So, it is valid that 'Some dogs are trees'. I is the opposite of this conclusion and so it holds true. All rats are trees. Some trees are not cats. Since the intermediate term 'trees' is not distributed even once in the statements, no definite conclusion is valid.