Two mathematicians were discussing their recent holdays. The first mathematician exclaims

I was on an all inclusive trip to lanserote for two weeks.

The second mathematician, slightly ashamed, didn't want to disclose where he went after that, so he wrote a puzzle for his colleague to solve.

This is where i went for my holiday this year.


Where did the second mathematician go on holiday.

  • 1
    $\begingroup$ Are any apparent typos ("lanserote" instead of "Lanzarote", lowercase "i") relevant? $\endgroup$
    – kovacsur
    Apr 3, 2019 at 17:30
  • $\begingroup$ @kovacsur Not sure, but it does stand out to me that the first 4 letters of the coded message are the same as the correct spelling of Lanzarote. $\endgroup$
    – Barker
    Apr 3, 2019 at 17:48
  • 1
    $\begingroup$ There are no typos that i can see. Let me add another tag to give some clarity. $\endgroup$ Apr 4, 2019 at 7:33

1 Answer 1


I think he went to



If we consider the letters in the Fibonacci numbered positions:
in the string, it spells Llandudno

  • $\begingroup$ That is exactly where he went. I didnt know if i explain the puzzle correctly. Or if the puzzle wasnt constructed well enough. $\endgroup$ Apr 5, 2019 at 13:02
  • 1
    $\begingroup$ I think you explained it fine. I think people may have been confused by the spelling "lanserote" in the second sentence, where it's usually "Lanzarote". Nice puzzle. $\endgroup$
    – hexomino
    Apr 5, 2019 at 13:05
  • 2
    $\begingroup$ @hexomino As a bonus, "Llanet" is a female forename... The first scientist was actually visiting his girlfriend! $\endgroup$ Apr 5, 2019 at 14:41

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