If you love testing your mind then it’s the perfect time of year as the annual GCHQ Christmas quiz has been released. The UK's intelligence, security and cyber agency creates a Christmas Challenge ...

Add Yahoo as a preferred source to see more of our stories on Google. Who doesn't love a good visual puzzle? For years we've been publishing Spot the Difference puzzles in our print magazine. To play, ...

If you fancy yourself as a budding spy, GCHQ’s Christmas challenge will put your analytical skills to the test. The UK spy agency, which sets an annual quiz aimed at children aged between 11 and 18, ...

GCHQ’s director, Robert Hannigan, included a challenge in his Christmas card this year that was subsequently opened to the public in an attempt to see if anyone could solve it. Well, after receiving ...

If you love testing your mind, then it’s the perfect time of year - the annual GCHQ Christmas quiz and the answers have been released. The UK's intelligence, security and cyber agency creates a ...

More than 500 schoolchildren took part in a competition to design the cover of the card. They were asked: “What do you think GCHQ looks like on Christmas Day?”, with the additional task of including ...

GCHQ, the UK’s intelligence agency, released its annual Christmas card on Wednesday, filled with puzzles and hidden codes. The spy agency's "Chief Puzzler", known as "Colin", said the notoriously ...