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IKMC 2021 - Grades 9-10 - Self-study Question 26

IKMC · IKMC 2021 - Grades 9-10 - Self-study

Question 26

Each of a and b is the square of an integer. The difference a−b is prime. Which could be b?
  1. 100
  2. 144
  3. 256
  4. 900
  5. 10 000