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VTMO 2026 - Grade 7 - Semifinal - SET 9 - Self-study Question 19

VTMO · VTMO 2026 - Grade 7 - Semifinal - SET 9 - Self-study

Question 19

Find the units digit of $1+4+4^2+4^3+\cdots+4^{100}$.
  1. 0
  2. 1
  3. 2
  4. 3
  5. 4