GCHQ has released its annual Christmas challenge, with this year's focusing on the "surprising geography" of the intelligence organisation. Many people are not aware that the intelligence ...

Every Christmas Day, the pressure is on the chef ... Article continues below "We've even teamed up with a scientist to crack the code for the perfect jug of gravy, every time." ...

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 ...

Code crackers and Pret superfans brace yourselves, as Pret A Manger has the ultimate case to unlock with 15 security safes popping up across the UK. Filled with the first taste of Christmas ...

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