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    OlympiadEasyNumber Theory7–9

    The four-digit number 5A62‾\overline{5A62} is divisible by 1111. Which digit is AA?

    O número de quatro algarismos 5A62‾\overline{5A62} é divisível por 1111. Qual é o algarismo AA?

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    Solution

    Step 1 of 3

    1. 1.A number is divisible by 1111 exactly when the alternating sum of its digits is.