SYLLOGISM (General Mental Ability) UPSC EPFO

Total Questions: 30

1. Examine the following statements :

I. All children are inquisitive.
II. Some children are inquisitive.
III. No children are inquisitive.
IV. Some children are not inquisitive.
Among these statements, the two statements which cannot both be true simultaneously but can both be false, would be

Correct Answer: (a) I and III
Solution:

2. Examine the following statements:

1. All members of Mohan’s family are honest.
2. Some members of Mohan’s family are not employed.
3. Some employed persons are not honest.
4. Some honest persons are not employed.
Which one of the following inferences can be drawn from the above statements?

Correct Answer: (b) The employed members of Mohan’s family are honest
Solution:

3. In each question below, there are three or two statements followed by two conclusions numbered I and II. You have to take the three given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follow from the statements.

Statements:
All shoes are pens.
Some pens are razors.
Some razors are desks.
Conclusions :
I. Some desks are shoes.
II. Some razors are shoes.

Correct Answer: (d) if neither I nor II follows.
Solution:

4. Statements:

Some benches are windows.
Some windows are walls.
Some walls are trains.
Conclusions:
I. Some trains are benches.
II. No train is bench.

Correct Answer: (c) if either I or II follows.
Solution:

5. Statements:

Some roofs are figures.
All figures are lions.
All lions are goats.
Conclusions:
I. Some goats are roofs.
II. All goats are figures

Correct Answer: (a) if only conclusion I follows.
Solution:

6. In each of the questions below are given three or more 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 commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements.

Statements:
Some towers are windows.
All windows are houses.
Some houses are temples.
Conclusions:
I. Some towers are temples.
II. Some houses are towers.
III. Some temples are windows.

Correct Answer: (b) Only II follows
Solution:

7. Statements:

Some walls are doors.
Some doors are cots.
Some cots are chairs.
Conclusions:
I. Some chairs are doors.
II. Some cots are walls.
III. No chair is door

Correct Answer: (c) Only either I or III follows
Solution:

8. Statements:

All books are leaves.
Some leaves are jungles.
No jungle is box.
Conclusions:
I. Some jungles are books.
II. No book is box.
III. Some leaves are boxes.

Correct Answer: (a) None follows
Solution:

9. In each of the questions below are given four statements followed by three conclusions numbered I, II & III. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:
All chilies are garlics.
Some garlics are onions.
All onions are potatoes.
No potato is ginger.
Conclusions:
I. No onion is ginger.
II. Some garlics are potatoes.
III. Some chillies are potatoes.

Correct Answer: (c) Only I & II follow
Solution:

10. Statements:

Some windows are doors.
All doors are walls.
No wall is roof.
All roofs are shelters.
Conclusions:
I. Some windows are walls.
II. No wall is shelter.
III. No door is shelter.

Correct Answer: (d) Only I follows
Solution: