12
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I'm a natural in math.

The variants of numbers to solve me don't go higher than 100 and 26.

What am I?

53
61
23
41
11
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  • $\begingroup$ Is this a number sequence to be continued, or an unknown object ("I") to be described? $\endgroup$ May 9 '15 at 11:52
  • $\begingroup$ An unknown object to be described. Thanks for throwing that in :) $\endgroup$ May 9 '15 at 11:53
  • $\begingroup$ I'm new to this so as a hint; rather think simple than complex. $\endgroup$ May 9 '15 at 11:57
  • $\begingroup$ I added the "riddle" tag since it's an unknown object to be described - hope you don't mind :-) Welcome to Puzzling SE btw! $\endgroup$ May 9 '15 at 11:58
  • $\begingroup$ Taking numbers mod 26 and converting to letters gives AIWOK - any use? $\endgroup$ May 9 '15 at 12:04
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The solution is

PRIME

The method for solving is:

First realise that all the numbers are prime.
Convert each prime to the index of the prime, e.g. $53 \to 16$ because $53$ is the 16th prime.
You get: $16\;18\;9\;13\;5$
Converting this using $a=1,b=2,\ldots,z=26$ you get the solution PRIME.

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  • $\begingroup$ Brilliant! And excellent puzzle, @Allendar: very obscure at first sight, but with an answer that's obvious once you see it. +1 to you both. $\endgroup$ May 9 '15 at 13:15
  • $\begingroup$ Awesome! :D I wasn't sure if my riddle wasn't complex or was serious enough for the level on this site. I hope it was ok :) $\endgroup$ May 9 '15 at 13:25

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