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2017 AMC 10A Problem 20

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2017 AMC 10A Problem 20AMC 10 Step by Step
Name:                             Date: September 13, 2026
Bases & Digits · difficulty 3 of 5 · about 4 min · position P16-20

Let S(n)S(n) equal the sum of the digits of positive integer nn . For example, S(1507)=13S(1507) = 13 . For a particular positive integer nn , S(n)=1274S(n) = 1274 . Which of the following could be the value of S(n+1)S(n+1) ?

  1. A)

    11

  2. B)

    33

  3. C)

    1212

  4. D)

    12391239

  5. E)

    12651265

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