Re: GCHQ Monday Puzzle

On Tue, 6 May 2025 07:36:14 +0100, Richard Heathfield wrote:

(b), however, is just one of their 'read my mind' puzzles that they love
to waste people's time with. A good cryptographer tries not to leave any
hooks you can pick at. A good puzzle setter tries to be fair to the
solver by leaving at least /one/ hook. GCHQ is packed full of good
cryptographers.

Yes, I can't get DO RE MI FA SOL LA SI out of my head now, but it isn't
that. For (b), there are ten in the series, which may suggest number
digits, but I haven't been able to progress that anywhere.

(c) is related to last week's puzzle, if you tried that.

I remember reading somewhere "If Britain ever faces a puzzle based threat,
we're in good hands".



--
David Entwistle