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IKMC 2023 - Grades 11-12 - Set 2 - Self-study Question 10

IKMC · IKMC 2023 - Grades 11-12 - Set 2 - Self-study

Question 10

What is the units digit of $(5^5+1)(5^{10}+1)(5^{15}+1)$?
  1. 1
  2. 2
  3. 4
  4. 5
  5. 6