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    Heather10

    Why Does 123, Repeated To Become123123, Divided By 7, Then 11, Then 13 Bring You Back To 123??

    This works with all the 3 digit numbers i've tried but i can't explain why.

    asked 1 year ago

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    1 Answer


    blt_junta

    It's not that difficult.
    123, repeated to become 123123,
    it equals 123x=123123
    x=1001

    and, 123123 divided by 7, then 11, then 13,
    it equals 123123=(7x11x13)y
    123123=(77x13)y
    123123=1001y
    so y=123

    answered 1 year ago   

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