Syllogism

Ladakh Police Sub-Inspector · Reasoning · 19 practice questions with answers and explanations: 10 Easy, 9 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Statements: All birds can fly. Penguins are birds. Conclusion: Penguins can fly. Is this conclusion logically valid based on the given statements?

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

Answer: A. Syllogism validity is judged on the logic of the statements given, not on real-world facts; here the conclusion follows logically.

Sample Easy question 2

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.

Sample Easy question 3

Statements: Some A are B. Some B are C. Conclusion: Some A are C. Is this valid?

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

Answer: B. Sharing category B does not guarantee any overlap between A and C, so the conclusion does not necessarily follow.

Sample Medium question 4

Statements: All pens are objects. All objects have mass. Conclusion: All pens have mass. Is this valid?

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

Answer: A. Since pens are objects and all objects have mass, all pens must have mass.

Sample Medium question 5

Statements: No mangoes are vegetables. Some fruits are mangoes. Conclusion: Some fruits are not vegetables. Is this valid?

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

Answer: A. The fruits that are mangoes cannot be vegetables, so some fruits are indeed not vegetables.

Sample Medium question 6

Statements: All cats are animals. Some animals are wild. Conclusion: Some cats are wild.

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

Answer: B. The 'wild animals' may not overlap with the 'cats' group, so the conclusion does not necessarily follow.

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