9
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What you see here is a complete sequence of dots and lines. Can you tell me what this sequence represents?


enter image description here

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    $\begingroup$ No knowledge required other than trivial. This is a sequence that will make sense once you figure out what it's all about. $\endgroup$ Jul 16, 2023 at 10:16
  • $\begingroup$ looks a lot like rot13(Raarntenz bs Crefbanyvgl), but I can't position the lines to match this one. Am I on the right track? $\endgroup$
    – Lezzup
    Jul 16, 2023 at 17:05
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    $\begingroup$ Wait, don't add the hint yet ... ;) $\endgroup$
    – M Oehm
    Jul 18, 2023 at 18:39
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    $\begingroup$ @MOehm Alright, I'll wait then $\endgroup$ Jul 18, 2023 at 18:42
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    $\begingroup$ Thanks. I'm sure your patience will be rewarded ... $\endgroup$
    – M Oehm
    Jul 18, 2023 at 18:47

1 Answer 1

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The sequence represents ...

... the first nine prime numbers.

How so?

The prime numbers are shown as full hours on a 12-hour analog clock, so that 5 is 05:00 am and 17 is 05:00 pm. The black dot is the centre of the clock face. The red line connects the tips of the hour and minute hands, which are not shown. The minute hand is always at the full hour position. The hour hand is about half as long as the minute hand.

2, 3, 5, 7, 11, 13, 17, 19, 23

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    $\begingroup$ A man of his word :) Great solve! rot13(Ol pbzcyrgr frdhrapr V whfg zrnag gurfr ner nyy gur shyy ubhe "cevzr gvzrf" (gjb gb gjragl-guerr) ab fhpu gvzr nf gjragl-avar, guvegl-bar rgp...) $\endgroup$ Jul 18, 2023 at 19:52

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