To try out other mathematical riddles in the 12 Puzzles of Christmas series, click here. Adam Spencer’s book The Number Games is available now from all good bookstores or visit www.adamspencer ...

GCHQ has released its fiendish Christmas puzzle to test budding James ... a talented cryptographer working on breaking Italian naval codes who later married GCHQ's seventh director Arthur Bonsall.

The puzzle features on a Christmas card sent by Sir Jeremy Fleming, director of the Cheltenham-based spy agency. Secondary schools across the country are trying to crack the code, intended to test ...

GCHQ’s Christmas puzzle contains hidden clues as ... technology, engineering and maths. “Puzzles have always been at the heart of GCHQ, and the skills needed to solve them are just as relevant ...

Every year, GCHQ releases a Christmas card containing a festive brainteaser ... best known for cracking the Enigma code during the Second World War, is hoping that schools and colleges across ...

Are you up for the challenge? Try solving these puzzles and see if you can crack the code! Whether you’re a maths lover or someone who simply enjoys a good riddle, these brain teasers are sure ...