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TIMO - 2020 - Grade 8 - Preliminary Round - Paper 2 Question 14

TIMO · TIMO - 2020 - Grade 8 - Preliminary Round - Paper 2

Question 14

Find the last digit of $4+4^2+4^3+\cdots+4^{2020}+4^{2021}$.
  1. 2
  2. 4
  3. 6
  4. 8