- Deductive Logic in general means to reach a certain logical conclusion from a general statement. The conclusion is usually derived from the stated premises. Solving such problem needs use of correct reasoning to determine a logical conclusion. The ability to logically examine the premises and determine the certain idea from a general statement helps build your reasoning abilities.
- The process of solving the problem involves taking various assumptions depending on the plot of the situation. You may even think of solving such a problem thinking backwards. Even the use of tables and Venn diagrams can be sort to solve the problem. While the main objective of this test is to strengthen your knowledge and reasoning skill by solving some logical problems.
- Make sure you have gone through the topic concepts before starting this test.
Deductive Logic:Test-3
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Question 1 |
Directions for the question: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logically derived conclusion of the first two.
A. Some icicles are cycles. All cycles are men. Some icicles are men.
B. All girls have teeth. No teeth are yellow. No girl is yellow.
C. No hand is foot. Some feet are heads. Some hands are heads.
D. Every man has a wife. All wives are devoted. No devoted has a husband.
A. Some icicles are cycles. All cycles are men. Some icicles are men.
B. All girls have teeth. No teeth are yellow. No girl is yellow.
C. No hand is foot. Some feet are heads. Some hands are heads.
D. Every man has a wife. All wives are devoted. No devoted has a husband.
A,B and C | |
A and B | |
C and B | |
All of Those |
Question 1 Explanation:
In statement C and D, the first two statements do not logically lead to the third statement. The icicles which are cycles are at least men. In B, if no tooth is yellow, no girl can be yellow, since all girls are teeth. Hence, option, 2 is the right choice.
Question 2 |
Directions for the question: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logically derived conclusion of the first two.
A. No sun is not white. All moon is sun. All moon is white.
B. All windows are open. No open space is allocated. All windows are closed spaces.
C. No German can fire. All Americans bombard. Both, Germans and Americans can fight.
D. No X is Z. No Z is Y. No X is Y.
A. No sun is not white. All moon is sun. All moon is white.
B. All windows are open. No open space is allocated. All windows are closed spaces.
C. No German can fire. All Americans bombard. Both, Germans and Americans can fight.
D. No X is Z. No Z is Y. No X is Y.
A only | |
B only | |
C only | |
D only |
Question 2 Explanation:
If no sun is not white, it means that all sun is white. B and D do not lead to any logical conclusions. In D, the possibility of X and Y sets intersecting does exists. A is the right choice.
Question 3 |
Directions for the question: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logically derived conclusion of the first two.A. No cowboys laugh. Some who laugh are sphinxes. Some sphinxes are not cowboys.
B. All ghosts are florescent. Some ghosts do not sing. Some singers are not florescent.
C. Cricketers indulge in swearing. Those who swear are hanged. Some who are hanged are not cricketers.
D. Some crazy people are pianists. All crazy people are whistlers. Some whistlers are pianists.
A and B | |
C only | |
A and D | |
D only |
Question 3 Explanation:
A is purely valid. Some sphinxes that laugh therefore are not cowboys, as no cowboy laughs. B is invalid as some florescent are not singers but not the converse. C is invalid as all cricketers are hanged and not its negation. D is valid as some pianists who are crazy people are therefore, wrestlers. And they are those some wrestlers who are pianists.
Question 4 |
Directions for the question: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logically derived conclusion of the first two.A. All Ts are squares. All squares are rectangular. All Ts are rectangular.
B. Some fat are elongated. Some elongated things are huge. Some fat are huge.
C. Idiots are bumblers. Bumblers fumble. Idiots fumble.
D. Water is good for health. Health food is rare. Water is rare.
D only | |
C only | |
Both A and C | |
All of these |
Question 4 Explanation:
if all Ts are squares and all squares are rectangles, it means that all Ts are rectangles. Also, if all idiots are bumblers and bumblers fumble, it means that idiots fumble. D leads to uncertain conclusion. Option 3 is the right choice.
Question 5 |
Directions for the question: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logically derived conclusion of the first two.
A. All good people are knights. All warriors are good people: all knights are warriors.
B. No footballer is a minister. All footballers are tough. Some ministers are players.
C. All pizzas are snacks. Some meals are pizzas. Some meals are snacks.
D. Some barkers are musk deer. All barkers are sloth bears. Some sloth bears are musk deer.
A. All good people are knights. All warriors are good people: all knights are warriors.
B. No footballer is a minister. All footballers are tough. Some ministers are players.
C. All pizzas are snacks. Some meals are pizzas. Some meals are snacks.
D. Some barkers are musk deer. All barkers are sloth bears. Some sloth bears are musk deer.
C and D | |
B and C | |
A only | |
C only |
Question 5 Explanation:
C and D is the right answer choice as the some meals that are pizzas are also snacks and the some musk deer that are barkers are also sloth bears. A is invalid as all knights are not warriors. B is invalid as since, it contains four different terms. Option 1 is the right choice.
Question 6 |
Directions for the question: The question contains six statements followed by four sets of combinations of three. Choose the set in which the statements are logically related.A. All leaves are green.
B. All leaves have chlorophyll.
C. Chlorophyll is green.
D. All plants have leaves.
E. All plants have chlorophyll.
F. Only leaves have chlorophyll
BDE | |
BEF | |
BDF | |
AEF |
Question 6 Explanation:
if all leaves have chlorophyll and all plants have leaves, hence, it follows that all plants have chlorophyll. Option 1 is the apt choice
Question 7 |
Directions for the question: The question contains six statements followed by four sets of combinations of three. Choose the set in which the statements are logically related.A. Some men are bald.
B. Bald people are intelligent.
C. Raman is a man.
D. Raman is bald.
E. Raman is intelligent.
F. All men are intelligent
ABF | |
BDE | |
BCD | |
BEF |
Question 7 Explanation:
if bald people are intelligent and Raman is bald. It follows that Raman is intelligent. Hence, the right sequence is BDE.
Question 8 |
Directions for the question: The question contains six statements followed by four sets of combinations of three. Choose the set in which the statements are logically related.
A. No barbarian is gentleman.
B. Some gentlemen are barbarians.
C. Some gentlemen are rude.
D. No gentlemen is rude.
E. Some barbarians are not rude.
F. All barbarians are rude.
A. No barbarian is gentleman.
B. Some gentlemen are barbarians.
C. Some gentlemen are rude.
D. No gentlemen is rude.
E. Some barbarians are not rude.
F. All barbarians are rude.
ABE | |
BCE | |
ADF | |
BDE |
Question 8 Explanation:
Some gentlemen are barbarians and no gentlemen are rude. Hence, the gentlemen who are barbarians are also not rude, it means that some barbarians are not rude. Hence, the right sequence is BDE.
Question 9 |
Directions for the question: The question contains six statements followed by four sets of combinations of three. Choose the set in which the statements are logically related.A. Metal is good material for desks.
B. Desks are made of metal.
C. This object is not a desk.
D. This object is a desk.
E. This object is not made of metal.
F. This is made of metal.
ADF | |
BCE | |
ABD | |
BDF |
Question 9 Explanation:
Desks are made up of metals. So, if an object is a desk, it means that it should be made up of metal. The right sequence is BDF
Question 10 |
Directions for the question: The question contains six statements followed by four sets of combinations of three. Choose the set in which the statements are logically related.A. Mathew and Paul are brothers.
B. Siblings are known to quarrel often.
C. Mathew and Paul don’t quarrel.
D. All those who quarrel are siblings.
E. Paul and Mathew quarrel often.
F. Mathew and Paul cannot be siblings.
BDE | |
ADF | |
CDE | |
ABE |
Question 10 Explanation:
Mathew and Paul are siblings and siblings are known to quarrel often. Hence, it follows that Mathew and Paul often quarrel. The right sequence is ABE
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Sir,
In deductive logic test:3,question no 2 answer as given seems to be incorrect .
can you please check it up.