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Thread: 1 to 30000 printed out as one long string; how often does 2017 appear?

  1. #1

    1 to 30000 printed out as one long string; how often does 2017 appear?

    A computer prints consecutively all figures of from 1 to 30000. There originates the following figure row: 123456789101112 ... 2999930000. How often does the annual number 2017 appear in this row?
    I can Count them, but how do I prove the logical answer?
    Last edited by mmm4444bot; 11-14-2017 at 10:59 PM. Reason: Removed 25 links to external dictionary

  2. #2
    Junior Member
    Join Date
    Nov 2017
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    Rochester, NY
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    You can prove it by showing how you counted. If you did so in a logical way, that can work as a proof.

    Would you like to show what you did, so we can comment on whether it is correct, or how to improve the way you explain it?

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