Skip to content / Đến nội dung
ThichHocToan.com

VTMO 2026 - Grade 8 - Semifinal - SET 08 - Self-study Question 4

VTMO · VTMO 2026 - Grade 8 - Semifinal - SET 08 - Self-study

Question 4

Find the units digit of $1\cdot3\cdot5\cdot7+3\cdot5\cdot7\cdot9+5\cdot7\cdot9\cdot11+\cdots+2011\cdot2013\cdot2015\cdot2017$.

Question illustration
  1. 0
  2. 2
  3. 4
  4. 6
  5. 8