Syllogism

Q: Statements: All Doctors are Engineers. All Engineers are Teachers. Conclusions: I. All Doctors are Teachers. II. Some Engineers are Doctors.

Correct Answer: Option C (Both conclusions I and II follow). Since all Doctors are inside Engineers and all Engineers are inside Teachers, all Doctors are definitely Teachers. Also, since all Doctors are Engineers, the intersection implies some Engineers are Doctors. Both follow.

Q: Statements: Some Rivers are Lakes. All Lakes are Oceans. Conclusions: I. Some Rivers are Oceans. II. All Rivers are Oceans.

Correct Answer: Option A (Only conclusion I follows). Since some Rivers are Lakes and all Lakes are Oceans, the overlapping part of Rivers must also be Oceans. Hence some Rivers are Oceans. We cannot definitively say all Rivers are Oceans. Only I follows.

Q: Statements: All Cats are Dogs. No Dogs is Rats. Conclusions: I. No Cats is Rats. II. Some Dogs are Cats.

Correct Answer: Option C (Both conclusions I and II follow). Since all Cats are inside Dogs, and Dogs has no intersection with Rats, Cats cannot intersect Rats. Also, all Cats are Dogs implies some Dogs are Cats. Both follow.

Q: Statements: Some Cars are Buses. No Buses is Trains. Conclusions: I. Some Cars are not Trains. II. No Cars is Trains.

Correct Answer: Option A (Only conclusion I follows). The part of Cars that overlaps with Buses cannot be Trains. Hence some Cars are not Trains. We cannot conclude that no Cars is Trains entirely. Only I follows.

Q: Statements: All Pens are Pencils. Some Pencils are Erasers. Conclusions: I. Some Pens are Erasers. II. Some Erasers are Pencils.

Correct Answer: Option B (Only conclusion II follows). We know some Pencils are Erasers, which directly implies some Erasers are Pencils. However, the intersection of Pencils and Erasers might not touch Pens. Hence I does not follow. Only II follows.

80 Questions

Practice Syllogism questions with answers and step-by-step solutions. These problems are curated from recent campus placement test papers (TCS, Infosys, Wipro, Cognizant, Accenture) and competitive government exams (SSC CGL, Bank PO, RRB NTPC, UPSC).

Quick Mode: Practice Questions Timed Mock Test

Syllogism: Reference Context & Data Shared for questions below

Directions & CaseletDirections: In each question below are given statements followed by conclusions. 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.

Reasoning Ability: Syllogism (80 Questions)

Q31

Statements:
All Doctors are Engineers.
All Engineers are Teachers.
Conclusions:
I. All Doctors are Teachers.
II. Some Engineers are Doctors.

medium

Q32

Statements:
Some Rivers are Lakes.
All Lakes are Oceans.
Conclusions:
I. Some Rivers are Oceans.
II. All Rivers are Oceans.

medium

Q33

Statements:
All Cats are Dogs.
No Dogs is Rats.
Conclusions:
I. No Cats is Rats.
II. Some Dogs are Cats.

medium

Q34

Statements:
Some Cars are Buses.
No Buses is Trains.
Conclusions:
I. Some Cars are not Trains.
II. No Cars is Trains.

medium

Q35

Statements:
All Pens are Pencils.
Some Pencils are Erasers.
Conclusions:
I. Some Pens are Erasers.
II. Some Erasers are Pencils.

medium

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Syllogism

Statements:
All Doctors are Engineers.
All Engineers are Teachers.
Conclusions:
I. All Doctors are Teachers.
II. Some Engineers are Doctors.

Community Discussion & Shortcut Formulas

Statements:
Some Rivers are Lakes.
All Lakes are Oceans.
Conclusions:
I. Some Rivers are Oceans.
II. All Rivers are Oceans.

Community Discussion & Shortcut Formulas

Statements:
All Cats are Dogs.
No Dogs is Rats.
Conclusions:
I. No Cats is Rats.
II. Some Dogs are Cats.

Community Discussion & Shortcut Formulas

Statements:
Some Cars are Buses.
No Buses is Trains.
Conclusions:
I. Some Cars are not Trains.
II. No Cars is Trains.

Community Discussion & Shortcut Formulas

Statements:
All Pens are Pencils.
Some Pencils are Erasers.
Conclusions:
I. Some Pens are Erasers.
II. Some Erasers are Pencils.

Community Discussion & Shortcut Formulas