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IKMC 2020 - Grades 11-12 - Set 2 - Self-study Question 24

IKMC · IKMC 2020 - Grades 11-12 - Set 2 - Self-study

Question 24

A large integer $N$ is divisible by all except two of the integers 2 through 11. Which pair could be the exceptions?
  1. 2 and 3
  2. 4 and 5
  3. 6 and 7
  4. 7 and 8
  5. 10 and 11