The UK's intelligence, security and cyber agency creates a Christmas Challenge puzzle every year and this year marks a decade ...
A viral riddle is sparking debate online, with claims that 90% of people get it wrong. The puzzle about a couple, their sons, ...
Fans of codebreaking, maths and brainteasers can now try their hand at the latest cryptic Christmas challenge set by GCHQ, ...
GCHQ’s chief puzzler, known only as Colin, added: “This year’s Christmas challenge features seven puzzles designed to test ...
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