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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results