Home Subjects Reasoning Ability Syllogism

Reasoning Ability
Syllogism

Critical thinking and logical reasoning questions

13 Q 8 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 1–10 of 13
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 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.3 Hard Syllogism
All novels are literary works. Some literary works are award-winning. No award-winning work is forgotten. Can we conclude some novels are not forgotten?
A Yes, definitely
B No, we cannot
C Only if explicitly stated
D Probably true
Correct Answer:  B. No, we cannot
EXPLANATION

While some literary works are award-winning and no award-winning work is forgotten, we cannot confirm that the novels which are literary works are among those award-winning works.

Test
Q.4 Hard Syllogism
No pessimist achieves success. All lazy people are pessimists. Some lazy people study. What about those who study?
A All who study are successful
B Some who study may not achieve success
C All who study are lazy
D No one who studies is lazy
Correct Answer:  B. Some who study may not achieve success
EXPLANATION

Some lazy people study, and all lazy people are pessimists, and no pessimist achieves success. Therefore, some who study may not achieve success.

Test
Q.5 Hard Syllogism
All renewable energy sources are sustainable. Some sustainable practices are costly. All costly practices require government support. Can we say all renewable energy sources require government support?
A Yes
B No
C Partially
D Insufficient data
Correct Answer:  B. No
EXPLANATION

While all renewable sources are sustainable, only some sustainable practices are costly. We cannot establish that all renewable energy sources are among those costly practices.

Test
Q.6 Hard Syllogism
All organic produce is healthy. Some healthy foods are affordable. No expensive item is affordable. Which conclusion is correct?
A All organic produce is affordable
B Some organic produce may not be expensive
C All affordable foods are organic
D Some expensive items are healthy
Correct Answer:  B. Some organic produce may not be expensive
EXPLANATION

Some healthy foods are affordable. Since all organic produce is healthy, some organic produce could be among those affordable healthy foods, hence some organic produce may not be expensive.

Test
Q.7 Hard Syllogism
All mountains are geographical features. Some geographical features are tourist attractions. All tourist attractions generate revenue. Can we conclude some mountains generate revenue?
A Yes, definitely
B No, we cannot
C Only partially
D Need more information
Correct Answer:  B. No, we cannot
EXPLANATION

Although mountains are geographical features and some geographical features are tourist attractions, we cannot confirm that the mountains which are geographical features are among those that are tourist attractions.

Test
Q.8 Hard Syllogism
All fruits are nutritious. Some nutritious foods are expensive. No expensive food is readily available. Which must be true?
A Some fruits are not readily available
B All fruits are expensive
C Some fruits are readily available
D The information is insufficient
Correct Answer:  D. The information is insufficient
EXPLANATION

While all fruits are nutritious, only some nutritious foods are expensive, so we cannot determine which fruits are expensive and therefore unavailable.

Test
Q.9 Hard Syllogism
All teachers are knowledgeable. Some knowledgeable people are not wise. Which statement must be true?
A Some teachers are not wise
B All teachers are wise
C No teacher is wise
D Cannot determine the relationship
Correct Answer:  D. Cannot determine the relationship
EXPLANATION

While some knowledgeable people are not wise, we cannot determine if the non-wise ones include teachers or not.

Test
Q.10 Hard Syllogism
Some intelligent people are not ambitious. All ambitious people are successful. Can we conclude that some intelligent people are not successful?
A Yes, definitely
B No, we cannot conclude
C No, the opposite is true
D Only some intelligent people are not successful
Correct Answer:  B. No, we cannot conclude
EXPLANATION

Although some intelligent people are not ambitious, this doesn't mean they are not successful through other means.

Test
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