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- Question
- If I talk to my professors, then I do not need to take a pill for headache.
A. I talked to my professors.
B. I did not need to take a pill for headache.
C. I needed to take a pill for headache.
D. I did not talk to my professors.
Options- A. AB only
- B. DC only
- C. CD only
- D. AB and CD
- Correct Answer
- AB and CD
ExplanationSame as above Ab and CD are logically correct.
- 1. Whenever Rajeev uses the internet, he dreams about spiders.
A. Rajeev did not dream about spiders.
B. Rajeev used the internet.
C. Rajeev dreamt about spiders.
D. Rajeev did not use the internet.
Options- A. AD
- B. DC
- C. CB
- D. DA Discuss
- 2. Either Ravana is a demon, or he is a hero.
A. Ravana is a hero.
B. Ravana is a demon.
C. Ravana is not a demon.
D. Ravana is not a hero.
Options- A. CD only
- B. BA only
- C. CD and BA
- D. DB and CA Discuss
- 3. Either the orangutan is not angry, or he frowns upon the world.
A. The orangutan frowns upon the world.
B. The orangutan is not angry.
C. The orangutan does not frown upon the world.
D. The orangutan is angry.
Options- A. CB only
- B. DA only
- C. AB only
- D. CB and DA Discuss
- 4. All irresponsible parents shout if their children do not cavort.
A. All irresponsible parents do not shout.
B. Children cavort.
C. Children do not cavort.
D. All irresponsible parents shout.
Options- A. AB
- B. BA
- C. CA
- D. All of these Discuss
- 5. Whenever Ram reads late into the night, his father beats him.
A. His father does not beat Ram.
B. Ram reads late into the night.
C. Ram reads early in the morning.
D. Ram's father beats him in the morning.
Options- A. CD
- B. BD
- C. AB
- D. None of these Discuss
- 6. A. Only if the water level in the coastal areas rises, then the people change their lifestyle.
B. People change their lifestyle only if they are rewarded.
C. If people are rewarded, then they will not change their lifestyle.
D. If the temperature rises, then the water level in the coastal areas rises.
E. Whenever the water level in the coastal area rises, then the temperature rises.
F. Unless the people change their lifestyle, temperature rises.
G. People are rewarded.
H. Water level in the coastal areas does not rise.
Options- A. C, D, F, G and H
- B. G, F, D, B and H
- C. E, F, G, H and B
- D. None of the above Discuss
- 7. A. If Kumar sings, then the audiences sleep.
B. If Kumar sings, then the audiences dance.
C. Unless audience do not dance, the concert will be successful.
D. Only if the audience dance, the concert will be successful.
D. Only if the audience dance, the concert will be successful.
E. If Vina dances, then Kumar sings.
F. Kumar sings only if Vina dances.
G. Vina dances
H. The concert is successful.
Options- A. C, F, G, B and H
- B. A, C, F, G and H
- C. E, C, G, B and H
- D. Both (2) and (3) Discuss
- 8. Manisha will eat the orange if Rajesh does not cook.
Bases on the information above which of the following must be true
Options- A. Manisha will not eat the orange if Rajesh cooks.
- B. If manisha did not eat the orange, then Rajesh did cook.
- C. If Manisha ate the orange, then Rajesh did not cook.
- D. If Rajesh does not cook, Manisha will eat the orange Discuss
- 9. Look at the sentences given below
(i) If the contract is valid, then X is liable.
(ii) If X is liable, he will be bankrupt.
(iii) If the bank loans him money, he will not go bankrupt.
Select the statement that is consistent with the above statements
Options- A. The contract is valid and the bank will loan him money.
- B. The contract is valid and the bank will not loan him money.
- C. The contract is not valid and he will go bankrupt.
- D. The contract is not valid and he is liable. Discuss
- 10. Unless teacher is agree, the class will continue and three will be a test.
Options- A. Teacher is agree it implies that either class will not continue or there will not be a test.
- B. The class will not continue or there is a test implies that teacher is agree.
- C. Teacher is not agree and the class will not continue implies that there will be a test.
- D. None of these Discuss
Logical Connectives problems
Search Results
Correct Answer: AD
Explanation:
Same as above AD is logically correct
Correct Answer: DB and CA
Explanation:
It is an example of either a or b type:
CD a ? - b that is logically incorrect.
BA a ? b that is also logically incorrect.
DB b ? a that is also logically correct
CA - a ? b that is also logically correct
Correct Answer: CB and DA
Explanation:
It is an example of either a or b type:
Consider CB it implies - b- a that is logically correct.
DA - it implies - a ? b that is also logically correct.
AB it implies - a ? - b that is logically incorrect.
Hence both CB and DA are correct.
Correct Answer: AB
Explanation:
As all irresponsible parents do not shout, it follows that the children cavort.
Correct Answer: None of these
Explanation:
None of the given options relates logically to the given statements.
Correct Answer: G, F, D, B and H
Explanation:
(H) Water level in the coast area does not rise
From (D) ? Temperature will not rise
From (F) ? People change their lifestyle
From (B) ? People will be rewarded, which is given in G.
Correct Answer: E, C, G, B and H
Explanation:
(G) ? Vina dances
From (E) ? Kumar sings
From (B) ? Audience dance
From (C) ? Concert will be successful, which is given in H.
Correct Answer: If manisha did not eat the orange, then Rajesh did cook.
Explanation:
The conclusion should be if Manisha ate the orange, then Rajesh did not cook.
Correct Answer: The contract is valid and the bank will not loan him money.
Explanation:
From first two statements we can conclude: 'if the contract is valid then X would be bankrupt.' Statement 3 is 'If he goes bankrupt, then the bank will not loan him the money.' From above two statements, we have: If the contract is valid, then the bank will not loan him the money. This is reflected in option B.
Correct Answer: The class will not continue or there is a test implies that teacher is agree.
Explanation:
This belongs to Type 3: "Unless X, Y and Z"
this statement implies that:
(~ X ? Y or Z)
(~ Y or/and ~ Z ? X) Given in option (B)
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