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2021 AMC 10A Problem 11

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2021 AMC 10A Problem 11AMC 10 Step by Step
Name:                             Date: September 13, 2026
Bases & Digits · difficulty 2 of 5 · about 3 min · position P11-15

For which of the following integers bb is the base- bb number 2021b−221b2021_b - 221_b not divisible by 33 ?

  1. A)

    33

  2. B)

    44

  3. C)

    66

  4. D)

    77

  5. E)

    88

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