Home Subjects Reasoning Ability Syllogism

Reasoning Ability
Syllogism

Critical thinking and logical reasoning questions

50 Q 8 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 1–10 of 50
Topics in Reasoning Ability
Q.1 Hard Syllogism
Some vegetarians are athletes. All athletes maintain discipline. Conclusions: I. Some vegetarians maintain discipline. II. All vegetarians are disciplined. Which conclusion(s) follow?
A Only I follows
B Only II follows
C Both I and II follow
D Neither I nor I nor II follows
Correct Answer:  A. Only I follows
EXPLANATION

Some vegetarians are athletes, and all athletes maintain discipline. Therefore, some vegetarians (the athlete ones) maintain discipline. I follows. II doesn't follow as not all vegetarians are athletes.

Test
Q.2 Medium Syllogism
All poets are creative. No creative person is lazy. Conclusions: I. No poet is lazy. II. Some lazy people are poets. Which conclusion(s) follow?
A Only I follows
B Only II follows
C Both I and II follow
D Neither I nor II follows
Correct Answer:  A. Only I follows
EXPLANATION

All poets are creative, and no creative person is lazy. By transitivity, no poet is lazy. I follows. II contradicts this, so II doesn't follow.

Test
Q.3 Easy Syllogism
In a series: 2, 6, 12, 20, 30, ?, Find the missing number.
A 40
B 42
C 44
D 48
Correct Answer:  B. 42
EXPLANATION

Pattern: 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42. Each term is n(n+1).

Test
Q.4 Medium Syllogism
Some birds are migratory. All migratory creatures travel long distances. Conclusions: I. Some birds travel long distances. II. All birds travel long distances. Which conclusion(s) follow?
A Only I follows
B Only II follows
C Both I and II follow
D Neither I nor II follows
Correct Answer:  A. Only I follows
EXPLANATION

Some birds are migratory, and all migratory creatures travel long distances. Therefore, some birds (the migratory ones) travel long distances. I follows. II doesn't follow as not all birds are necessarily migratory.

Test
Q.5 Easy Syllogism
Traveling 30 km east, then 40 km north, then 30 km west, finally 20 km south. How far and in which direction from the starting point?
A 20 km north
B 20 km south
C 30 km north
D 10 km east
Correct Answer:  A. 20 km north
EXPLANATION

Net east-west displacement: 30 - 30 = 0 km. Net north-south displacement: 40 - 20 = 20 km north. Final position is 20 km north of starting point.

Test
Q.6 Medium Syllogism
All innovators are risk-takers. Some risk-takers are not successful. Conclusions: I. Some innovators are not successful. II. All innovators are unsuccessful. Which conclusion(s) follow?
A Only I follows
B Only II follows
C Both I and II follow
D Neither I nor II follows
Correct Answer:  D. Neither I nor II follows
EXPLANATION

All innovators are risk-takers, but 'some risk-takers are not successful' doesn't tell us which risk-takers. Innovators might be the successful ones. So I doesn't follow. II clearly doesn't follow.

Test
Q.7 Easy Syllogism
If TRAIN is coded as 20-18-1-9-14, how is PLANT coded?
A 16-12-1-14-20
B 16-12-1-9-14
C 15-11-1-14-20
D 16-13-1-14-20
Correct Answer:  A. 16-12-1-14-20
EXPLANATION

Each letter is coded as its position in alphabet: T=20, R=18, A=1, I=9, N=14. Similarly: P=16, L=12, A=1, N=14, T=20. So PLANT = 16-12-1-14-20.

Test
Q.8 Easy Syllogism
Pointing to a photograph, Ravi said, 'She is the daughter of my father's only son.' Who is the person in the photograph to Ravi?
A Sister
B Niece
C Daughter
D Mother
Correct Answer:  B. Niece
EXPLANATION

Ravi's father's only son = Ravi himself. Ravi's son's daughter = Ravi's niece. The photograph shows Ravi's niece.

Test
Q.9 Hard Syllogism
No artist is a businessman. All businessmen are ambitious. Conclusions: I. No artist is ambitious. II. Some ambitious people are not artists. Which conclusion(s) follow?
A Only I follows
B Only II follows
C Both I and II follow
D Neither I nor II follows
Correct Answer:  B. Only II follows
EXPLANATION

From premises, we know artists ≠ businessmen, and all businessmen are ambitious. This means ambitious people exist (businessmen), but we cannot conclude all ambitious are businessmen. So II follows (some ambitious are not artists). I doesn't follow as non-businessmen artists could be ambitious.

Test
Q.10 Medium Syllogism
In a row of 8 people, A is 3rd from the left. B is 2 positions to the right of A. C is at one end. How many people are between B and C?
A 2
B 3
C 4
D 5
Correct Answer:  B. 3
EXPLANATION

A is 3rd from left. B is 2 positions right of A, so B is at 5th position. C is at one end (either 1st or 8th). If C is 1st, people between = 3 (positions 2,3,4). If C is 8th, people between = 2 (positions 6,7). Most likely C at 1st = 3 people between.

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