Classify prime and composite numbers — Review — page 1
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Worksheet directions

Grade 4 • Review • Choose a strategy for each problem. Explain or check your thinking where requested.

Sample questions

  1. Classify 97 as prime, composite, or neither. Support your answer with its positive factors. Answer: ___
  2. A student calls 1 prime because only 1 divides it. Explain why this definition is incomplete. Answer: ___
  3. Classify 19 as prime, composite, or neither. Support your answer with its positive factors. Answer: ___
  4. Classify 21 as prime, composite, or neither. Support your answer with its positive factors. Answer: ___
  5. Classify 29 as prime, composite, or neither. Support your answer with its positive factors. Answer: ___
  6. Classify 37 as prime, composite, or neither. Support your answer with its positive factors. Answer: ___

See the preview for diagrams, answer spaces, and the complete layout.

Common Core connections

Source labels: 4.OA.B.4. Review the learning goals below to check the fit for your class.

  • 4.OA.B.4 — Factors, multiples, prime and composite

Bring it into your lesson

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