Skip to content / Đến nội dung
ThichHocToan.com

TIMO - 2021 - Grade 7 - Preliminary Round - Paper 5 Question 6

TIMO · TIMO - 2021 - Grade 7 - Preliminary Round - Paper 5

Question 6

Find $1+3+9+\cdots+729+2187$.
  1. 3260
  2. 3270
  3. 3280
  4. 3290