Sajit Kumar and M. Gagan Solutions for Chapter: Logical Reasoning, Exercise 3: Multiple Choice Questions

Statements:

(i) If it is cloudy, the lion will roar.
(ii) Lions don't roar.

Conclusions:

I. It is not cloudy.
II. It is cloudy.
III. Lions roar only in cloudy night.
IV. Lion will roar only on the cloudy day.

Statement: All students are not genius.
Conclusions:

I. Many students are not genius.
II. All genius are students.

Statements:

I. We know a professor of a university.
II. He has a beard.

Inference:

All the professors of the university have a beard.

Statements:

I. Mammals cause their young ones to drink milk.
II. Rabbits cause their young ones to drink milk.

Inference:

Rabbit is a mammal.

Statements:

I. Mice eat cheese.

II. Cheese is used in the omelette.

Inference:

Mice can eat omelette.

Statements:

I. All successful students believe in labour.
II. Labour cannot go in vain in workful life.

Inference:

After death, we remember the quality of labour.

Statement:

I. Water boils at ${100}^{\mathrm{o}}\mathrm{C}.$ This liquid boils at ${100}^{\mathrm{o}}\mathrm{C}.$ Therefore, this liquid is water.
II. Every bottle with a blue label contains fruit juice. Fruit juice is safe to drink. Therefore, it is harmless to drink from every bottle with a blue label.

Inference:

Blue label bottles are harmless. Therefore, one who drinks from it is a good man.

Statement:

I. Some birds are jackals. No fox is the bird. Therefore no fox is a jackal.
II. All birds are not jackals.

Inference:

Some crows are monkeys. Therefore, some monkeys are not jackals.