Syllogism

JKSSB Sub-Inspector (Telecommunication) · General Intelligence & Reasoning · 19 practice questions with answers and explanations: 4 Easy, 7 Medium, 8 Hard.

Sample questions

Sample Easy question 1

Statements: All cats are animals. All animals are living beings. Conclusion: All cats are living beings. Is this conclusion valid?

  1. Valid
  2. Invalid
  3. Cannot be determined
  4. None of these
Show answer

Answer: A. This is a valid syllogistic chain: cats ⊂ animals ⊂ living beings.

Sample Medium question 2

Statements: All roses are flowers. All flowers are plants. Conclusion: All roses are plants.

  1. Follows
  2. Does not follow
  3. Cannot be determined
  4. Both follow
Show answer

Answer: A. This is a valid syllogism chain, so the conclusion follows.

Sample Hard question 3

Statements: Some doctors are engineers. No engineer is a fool. Conclusions: I. No doctor is a fool. II. Some doctors are not fools.

  1. Only I follows
  2. Only II follows
  3. Both follow
  4. Neither follows
Show answer

Answer: B. Since some doctors are engineers and no engineer is a fool, at least those doctors are not fools — so only conclusion II follows.

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