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IKMC 2024 - Grades 9-10 - Self-study Question 30

IKMC · IKMC 2024 - Grades 9-10 - Self-study

Question 30

Among n distinct lines in a plane, lines ℓ₁, ℓ₂ and ℓ₃ intersect respectively 5, 9 and 11 other lines. Which value of n is possible?
  1. 11
  2. 12
  3. 13
  4. 14
  5. 15