Skip to content / Đến nội dung
ThichHocToan.com

IMAS 2023–2024 Junior Division — First Round Question 6

IMAS · IMAS 2023–2024 Junior Division — First Round

Question 6

What is the remainder when the sum $1\times2+2\times3+3\times4+\cdots+2022\times2023$ is divided by 11?
  1. $10$
  2. $8$
  3. $4$
  4. $2$
  5. $0$