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2017 AMC 10B Problem 1

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2017 AMC 10B Problem 1AMC 10 Step by Step
Name:                             Date: September 13, 2026
Bases & Digits · difficulty 1 of 5 · about 2 min · position P1-10

Mary thought of a positive two-digit number. She multiplied it by 33 and added 1111 . Then she switched the digits of the result, obtaining a number between 7171 and 7575 , inclusive. What was Mary's number?

  1. A)

    1111

  2. B)

    1212

  3. C)

    1313

  4. D)

    1414

  5. E)

    1515

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