Skip to content / Đến nội dung
ThichHocToan.com

2013 AMC 10B Question 13

AMC10 · 2013 AMC 10B

Question 13

Jo and Blair take turns counting from $1$ to one more than the last number said by the other person. Jo starts by saying “$1$”, so Blair follows by saying “$1,$ $2$”. Jo then says “$1,$ $2,$ $3$”, and so on. What number is spoken in position $53$?
  1. $ 2 $
  2. $ 3 $
  3. $ 5 $
  4. $ 6 $
  5. $ 8 $