As ever, please do NOT post your answers, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

Into codes?  Yesterday a friend handed me this piece of paper and said that the numbers (15122 1116 96011621) contained a hidden message…. can you work it out?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.


  1. Boringly easy – I worked out the transformation in a few seconds then used a single operation in an external program to produce the solution. It reminds me of 128 root e980…

  2. lol 😀 Clever one, Richard, thanks for that! Interesting friend you have there 😉 Instantly saw how to read the code and took, I don’t know, probably less than a minute to read it fully and be sure. Nice one 😀

  3. Took me forever this week, but after reading the comments, I of course got it instantly, since the usual s decide to give the answer away. So in the spirit of honesty, I can’t say I solved it this weekbut being given the solution is just no fun

    A while back Richard disabled comments completely because of this problem, is that really what people want to see happening again?

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