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2010 AMC 10B Problem 21

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2010 AMC 10B Problem 21AMC 10 Step by Step
Name:                             Date: September 13, 2026
Bases & Digits · difficulty 3 of 5 · about 3 min · position P21-25

A palindrome between 10001000 and 10,00010,000 is chosen at random. What is the probability that it is divisible by 77 ?

  1. A)

    110\dfrac{1}{10}

  2. B)

    19\dfrac{1}{9}

  3. C)

    17\dfrac{1}{7}

  4. D)

    16\dfrac{1}{6}

  5. E)

    15\dfrac{1}{5}

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