- 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.
Logical Consistency:Test-2
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Question 1 |
Either Sam is ill or he is drunk.
A. Sam is ill.
B. Sam is not ill.
C. Sam is drunk.
D. Sam is not drunk.
A. Sam is ill.
B. Sam is not ill.
C. Sam is drunk.
D. Sam is not drunk.
AB | |
DA | |
AC | |
CD |
Question 1 Explanation:
Answer: B
Solution:
Sam is not drunk so he must be ill. As either of the situation has to be valid. Hence, option B is the right choice.
Question 2 |
Whenever Ram hears of a tragedy, he loses sleep.
A. Ram heard of a tragedy.
B. Ram did not hear of a tragedy
C. Ram lost sleep
D. Ram did not sleep.
CA | |
BD | |
DB | |
AD |
Question 2 Explanation:
Answer: D
Solution:
This is a simple if-else question. It simply means that whenever Ram hears of a tragedy, he does not sleep. As Ram heard of the tragedy, that means he did not sleep. In the other case, where it is given that Ram does not sleep, we do not know the cause, that is we cannot say for sure whether he heard of a tragedy or not.
Question 3 |
Either the train is late; or it has derailed.
A. The train is late.
B. The train is not late.
C. The train is derailed
D. The train is not derailed.
AB | |
DB | |
CA | |
BC |
Question 3 Explanation:
Answer: DSolution:
The train is not late, hence it must have derailed. One of the either condition has to be true. Hence, option D is the apt choice.
Question 4 |
Vipin is in the class when Prashant is in the lab.
A. Prashant is in the lab.
B. Vipin is in the park.
C. Prashant is not in the lab.
D. Vipin is in the class.
CA | |
AD | |
BC | |
BD |
Question 4 Explanation:
B
Solution:
This conforms to the general case ‘When X then Y’. So When Prashant is in the lab, then Vipin is in the class or Vipin is not in the class then Prashant is not in the lab. So AD is correct.
Question 5 |
You will add more value to the team if team meetings are done.
A. Team meetings were done.
B. More value was not added to the team.
C. More value was added to the team.
D. Team meetings were not done.
BD | |
DB | |
BC | |
DC |
Question 5 Explanation:
A
Solution:
If team meetings were done then you added more value to the team or you did not add more value then team meetings were not done. So AC or BD are correct and thus option A is the correct answer.
Question 6 |
The cat sleeps only when her master is away from the room.
A. The master is away
B. The cat did not sleep.
C. The cat slept.
D. The master is in the room.
DB | |
AB | |
DC | |
BC |
Question 6 Explanation:
A
Solution:
This confirms to the case =only when X then Y means Y happen then X happens or its contra positive X did not happen then Y did not happen. So we say the cat slept means master is away, or the master is not away then the cat did not sleep. Thus, option A is the correct answer.
Question 7 |
If Bothom and Boon are selected in that order, Smith and Steyn cannot be selected.
A. Smith and Steyn are selected in that order.
B. Boon and Bothom are selected in that order.
C. Bothom and Boon are selected in that order.
D. Smith and Steyn are not selected.
A. Smith and Steyn are selected in that order.
B. Boon and Bothom are selected in that order.
C. Bothom and Boon are selected in that order.
D. Smith and Steyn are not selected.
BC | |
CD | |
BD | |
DB |
Question 7 Explanation:
Solution:
This is called compound hypothetical. If A and B then not C and D, Then C and D then not A or not B. Option B
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