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    An Grade 4 Math Olympiad problem

    Math Problems
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    • A
      altruisticgoat M0 M1 last edited by

      What are the last 3 digits of the sum 1+11+111+...+111(70 digits)...+111?

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      • T
        thoughtfulmongoose M2★ M3★ M4★ M5★ last edited by

        =1+11+111 times 68
        =12+548
        =560

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