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IMAS 2021 — Upper Primary Grades 5–6 — Round 1 Question 4

IMAS · IMAS 2021 — Upper Primary Grades 5–6 — Round 1

Question 4

Among the choices, which is NOT a prime number?
  1. 2
  2. 7
  3. 37
  4. 337
  5. 3337