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VTMO 2026 - Grade 9 - Semifinal - SET 09 - Self-study Question 1

VTMO · VTMO 2026 - Grade 9 - Semifinal - SET 09 - Self-study

Question 1

For how many integers n is $n^2-20n+119$ prime?
  1. 0
  2. 1
  3. 2
  4. 4
  5. Infinitely many