Skip to content / Đến nội dung
ThichHocToan.com

2017 AMC 12A Question 18

AMC12 · 2017 AMC 12A

Question 18

Let $S(n)$ equal the sum of the digits of positive integer $n.$ For example, $S(1507)=13.$ For a particular positive integer $n,$ $S(n)=1274.$ Which of the following could be the value of $S(n+1)?$
  1. $1$
  2. $3$
  3. $12$
  4. $1239$
  5. $1265$