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ITMC 2018 Grade 9 National Preliminary set01 Question 8

ITMC · ITMC 2018 Grade 9 National Preliminary set01

Question 8

A composite number is a positive integer expressible as a product of two or more smaller positive integers greater than 1. For example, $6=2\times3$ is composite, but 17 is not. (1) Every prime number is not composite. (2) Every number that is not composite must be prime. Which option is true?
  1. Both are true.
  2. (1) true, (2) false.
  3. (1) false, (2) true.
  4. Both are false.
  5. Insufficient information.