R. S. Aggarwal Solutions for Chapter: Logic, Exercise 3: EXERCISE

Directions: In the question below are given three statements followed by three conclusions numbered I, II, and III. You have to take the given statements to be true even if they seem to be at variance from the commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements is regarding commonly known facts.

Statements: Some pictures are frames. Some frames are idols. All idols are curtains

Conclusions: 
I. Some curtains are pictures.
II. Some curtains are frames.
III. Some idols are frames. 

Statements: 
All doors are buses.
All buses are leaves.
No leaf is a flower.

Conclusions:
I. No flower is a door.
II. No flower is a bus.
III. Some leaves are doors.
IV. Some leaves are buses.

Statements: 
No house is school.
All colleges are schools.
All schools are teachers.

Conclusions: 
I. No house is a teacher.
II. All colleges are teachers.
III. Some teachers are not houses.
IV. No college is house.

Directions: In the fol­lowing question, three statements are given followed by four conclusions numbered I, II, III, and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclu­sions logically follows from the given statements disregarding commonly known facts.

Statements: Some papers are cats. All cats are bats. No bat is a horse.

Conclusions:

I. Some papers are horses.

II. No horse is a cat.

III. Some bats are papers.

IV. All papers are bats.

Directions: In the fol­lowing question, three statements are given followed by four conclusions numbered I, II, III, and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclu­sions logically follows from the given statements disregarding commonly known facts.

Statements:

All buildings are windows.

No toys are building.

Some tigers are toys.

Conclusions:

I. Some tigers are buildings.

II. Some windows are tigers.

III. All toys are tigers.

IV. Some windows are toys.

In the fol­lowing question, three statements are given followed by four conclusions numbered I, II, III, and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclu­sions logically follows from the given statements disregarding commonly known facts.

Statements:
Some pearls are stones.
Some stones are diamonds.
No diamond is a gem.

Conclusions:
I. Some gems are pearls.
II. Some gems are diamonds.
III. No gem is a diamond.
IV. No gem is a pearl.

Directions: In the fol­lowing question, three statements are given followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclu­sions logically follows from the given statements disregarding commonly known facts.

Statements: No man is sky. No sky is road. Some men are roads.

Conclusions:

I. No road is man.

II. No road is sky.

III. Some skies are men.

IV. All roads are men.

Directions: In the fol­lowing question, three statements are given followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclu­sions logically follows from the given statements disregarding commonly known facts.

Statements: Some dogs are rats. All rats are trees. Some trees are not dogs.

Conclusions:  

I. Some trees are dogs.

II. All dogs are trees.

III. All rats are dogs.

IV. No tree is dog.