Skip to content / Đến nội dung
ThichHocToan.com

Australian AMC 2020 - Middle Primary Question 25

AMC AUSTRALIA · Australian AMC 2020 - Middle Primary

Question 25

Karl likes to avoid walking on the cracks in the footpath by taking three equally spaced steps for every two blocks. Every third block of the footpath is darker than the others, as shown.

Question illustration

In his first 100 steps, how many times does Karl’s left foot step on a darker block?
  1. 11
  2. 16
  3. 21
  4. 25
  5. 33