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GCHQ Christmas Challenge Puzzles | Hacker News Reader
GCHQ Christmas Challenge Puzzles
bbc.com
6 points
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dave333
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2 comments
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dave333
(original poster)
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Link is to BBC article. Direct link to puzzle PDF is
https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%2...
gnabgib
·
Small discussion (15 points, 3 days ago, 4 comments)
https://news.ycombinator.com/item?id=42385929
Reply on news.ycombinator.com