Syllogism

JKSSB Sub-Inspector (Executive) · 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: Some books are pens. All pens are pencils. Conclusion: Some books are pencils. Is this valid?

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

Answer: A. The books that are pens must also be pencils, since all pens are pencils.

Sample Hard question 3

Statements: All roses are flowers. No flower is a weed. Conclusion: No rose is a weed. Is this valid?

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

Answer: A. Since roses are flowers and no flower is a weed, no rose can be a weed.

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