Syllogism Questions for SBI PO 2019 | Syllogism Questions PDF for SBI PO 2019 and IBPS PO 2019 at Smartkeeda

Directions: In each question below are given some statements followed by some conclusions. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows/follow from the given statements, disregarding commonly known facts.
1
Statements:
All engineers are villagers.
No villager is a nurse.
All nurses are managers.
 
Conclusions:
No engineer is a manager.
All villagers being managers is a possibility
» Explain it
A
Conclusions:
No engineer is a manager.
All villagers being managers is a possibility
 
No villager is a nurse (E) + All nurses are managers (A) = E + A = O = Some managers are not villagers (O).
 
Thus, the possibility in II exists.
 
Hence conclusion II follows.
 
Again, All engineers are villagers (A) + No villager is a nurse (E) = A + E = E = No engineer is a nurse (E) +
 
All nurses are managers (A) = E + A = O Some managers are not engineers.
 
Hence, conclusion I does not follow.
 
Hence, option A is correct.

2
Statements:
Some paints are shoes.
Some shoes are sleepers.
All sleepers are shirts.
 
Conclusions:
At least some shirts are paints.
No shirt is a paint.
Some tables are chairs.
» Explain it
D
Some shoes are sleepers (I) + All sleepers are shirts (A) = A + I = I = shoes are shirts (I).
 
Now, Some paints are shoes (I) + Some shoes are shirts (I) = I + I = No conclusion.
 
But both I and ll make a complementary pair (I-E).
 
Hence, either conclusion I or II follows.
 
Hence, option D is correct.

3
Statements:
Some chairs are desks.
No desk is a bench.
 
Conclusions:
All benches being tables possibility.
At least some desks are tables.
» Explain it
E
Some chairs are desks (I) + No desk is a bench (E) = I + E = O = Some chairs are not benches (O).
 
Now, Some tables are chairs (I) + Some chairs are not benches (O) = I + O = No conclusion
 
But the possibility in I exists.
 
Hence conclusion I follows.
 
Again, Some tables are chairs (I) + Some chairs are desks (I) = I + I = No conclusion.
 
Hence conclusion II does not follow.
 
Hence, option E is correct.

4
Statements:
Some cows are camels.
All camels are buffaloes.
No buffalo is a fox.
 
Conclusions :
Some camels are foxes.
No buffalo is a cow.
No cow is a fox.
» Explain it
D
All camels are buffaloes (A) + No buffalo is a fox (E) = A + E = E = No camel is a fox (E).
 
Hence conclusion I does not follow.
 
Now, some cows are camels (I) + No camel is a fox (E) = I + E = O = Some cows are not foxes (O).
 
Hence, conclusion I does not follow.
 
Again, some cows are camels (I) + All camels are buffaloes (A) = I + A =I = Some cows are buffaloes (I).
 
Hence, II does not follow.
 
Thus, conclusion I and II do not follow.
 
Hence, option D is correct.

5
Statements:
No printer is a scanner.
Some scanners are mouses .
Some mouses are keyboards.
 
Conclusions:
Some mouses are scanners.
No keyboard is a printer.
No keyboard is a mouse.
» Explain it
C
Some scanners are mouses (I) → conversion → Some mouses are scanners (I).
 
Hence conclusion I follows.
No printer is ascanner (E) + Some scanners are mouses (I) = E + I = O* = Some mouses are not printers (O*).
 
Again, some keyboards are mouses (I) + Some mouses are not printers (O) = I + O = No conclusion, Hence conclusion II may follow.
 
Some mouses are keyboards (I) → conversion → I = Some keyboards are mouses (I).
 
Hence conclusion III does not follw.
 
Hence, option C is correct