They are some of the nation's brightest minds, so it is perhaps of no surprise the boffins at GCHQ set a quiz question that left radio listeners stumped. The Countdown-inspired Maths problem ...

For almost 26 years, thousands of viewers have tried their luck at a tricky Countdown conundrum or maths problem from the safety of their armchair. The Channel 4 staple has had fans try their luck ...

Channel 4 aired its latest episode of Countdown on Wednesday, May 3 and saw Rachel Riley back in front of the number board. During the numbers round, and often the hardest of them all, the contestants ...