• 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-4

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Question 1
A. Some of my closest friends disapprove of me. B. Some of my closest friends are aardvarks. C. All of my closest friends disapprove of me. D. All who disapprove of me are aardvarks. E. Some who disapprove of me are aardvarks. F. Some of my closest friends are no aardvarks.
A
BCD
B
ABD
C
BCE
D
ABE
Question 1 Explanation: 
ANSWER: C Solution: If some of my closest friends are aardvarks, but all of them disapprove of me, it implies that some of those who disapprove of me are aardvarks. Hence, the answer is option C.
Question 2
A. All those who achieve great ends are happy. B. All young people are happy. C. All young people achieve great ends. D. No young people achieve great ends. E. No young people are happy, F. Some young people are happy.
A
ADE
B
ABF
C
ACB
D
ADF
Question 2 Explanation: 
ANSWER: C Solution: All those who achieve good ends are happy and all young people achieve good ends. Therefore all young people are also happy. Option C is the only correct choice.
Question 3
A. All candid men are persons who acknowledge merit in a rival.
B. Some learned men are very candid.
C. Some learned men are not persons who acknowledge merit in a rival.
D. Some learned men are persons who are very candid.
E. Some learned men are not candid.
F. Some persons who acknowledge merit in a rival are learned.
A
ABE
B
ACF
C
ADE
D
BAF
Question 3 Explanation: 
If some learned men are candid but all candid men recognize merit in a rival, it follows that some men recognize merit in a rival are learned. Option D is the answer.
Question 4
A. All vegetarians eat meat B. All those who eat meat are not vegetarians C. All those who eat meat are carnivorous D. All vegetarians are carnivorous. E. All those who eat meat are vegetarians. F. All carnivores are vegetarians.
A
BCE
B
ABE
C
ACD
D
ACF
Question 4 Explanation: 
Answer: C This is a simple question, and uses the following sequence: All A are B, All B are C, Thus, All A are C.
Question 5
A. No attendants are qualified. B. Some nurses are qualified. C. Some nurses are not qualified. D. All nurses are attendants. E. All attendants are qualified. F. Some attendants are qualified.
A
ABF
B
CDF
C
BDF
D
BDE
Question 5 Explanation: 
Answer: C Following the logical sequence in statements BDF: Some nurses are qualified and all nurses are attendants. This implies that some of the attendants are qualified.
Question 6
A. Mary is John’s wife.
B. Mary and John danced together.
C. Mary wears John’s ring.
D. Husbands and wives danced the last waltz.
E. John loves Mary.
F. John danced last with Mary.
A
ADF
B
ABD
C
ACE
D
AEF
Question 6 Explanation: 
Answer: A If Mary and John are wife and husband and the last waltz was danced by husbands and wives, it follows that John danced last with Mary.
Question 7
A. All roses are fragrant. B. All roses are majestic. C. All roses are plants. D. All plants need air. E. All roses need air. F. All plants need water.
A
ABC
B
BCD
C
CDE
D
CEF
Question 7 Explanation: 
Answer: C If all roses are plants need all plants need air, then all roses will also need air.
Question 8
A. Laxman is a man. B. Meera is Laxman’s wife. C. Some women are islands. D. No man is an island. E. Meera is not an island. F. Laxman is not a island.
A
ADE
B
ABE
C
ADF
D
CDE
Question 8 Explanation: 
Answer: C Laxman is a man and no man is an island, so Laxman cannot be an island.
Question 9
A. All vegetarians eat meat. B. All those who eat meat are not vegetarians. C. All those who eat meat are herbivorous. D. All vegetarians are carnivorous. E. All those who eat meat are carnivorous. F. Vegetarians are herbivorous
A
BCE
B
ABE
C
ACD
D
ACF
Question 9 Explanation: 
Answer: option D Solution: If all vegetarians eat meat and all those who eat meat are herbivores, it follows that all vegetarians are herbivores
Question 10
A. All roses have thorns. B. All roses have nectar. C. All plants with nectar have thorns. D. All shrubs have roses. E. All shrubs have nectar. F. Some roses have thorns.
A
BEF
B
BCF
C
BDE
D
ACF
Question 10 Explanation: 
ANSWER. C Solution: If all roses have nectar and all shrubs are roses, it follows that all shrubs have nectar.
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