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VTMO 2026 - Grade 8 - Semifinal - SET 3 - Self-study Question 15

VTMO · VTMO 2026 - Grade 8 - Semifinal - SET 3 - Self-study

Question 15

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