Statements: All dogs are mammals. No mammal is a bird. Conclusions: I. No dog is a bird. II. Some birds are not dogs. III. All mammals are dogs. Which conclusions follow? MCQ with Answer and Explanation
Statements: All dogs are mammals. No mammal is a bird. Conclusions: I. No dog is a bird. II. Some birds are not dogs. III. All mammals are dogs. Which conclusions follow?
A. Only I
B. Only I and II
C. Only II
D. None
Answer: Option B
Solution (By JKSSB Mock Tests)
Since all dogs are mammals and no mammal is a bird, no dog is a bird follows. Also, since no dog is a bird, some birds are not dogs follows.
A clock is set right at 8 a.m. The clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 1 p.m. on the following day?
Explanation:
From 8 a.m. to 1 p.m. next day is 29 hours. The clock gains 10 min in 24 hours, so in 29 hours gains (10/24)×29 = 145/12 ≈12.083 min. When clock shows 29 hours, actual time passed is 29 - 12.083/60 hours ≈28 hours 47.9 min, so true time is about 12:48 p.m. Standard answer is 48 min past 12.
Statements: Some cups are plates. No plate is a spoon. All spoons are bowls. Conclusions: I. Some cups are not spoons. II. No cup is a spoon. III. Some bowls are not plates. Which conclusions follow?
Explanation:
Cups that are plates cannot be spoons, so some cups are not spoons follows. Some bowls that are spoons are not plates, so III follows. II is too strong.
No comments yet. Be the first to start the discussion!