Countdown was a cult afternoon TV programme shown at 4.30pm on weekdays presented by the late Richard Whiteley.
Here is one of the most amazing maths question answers I've seen (the contestant is presented with six numbers and has to use some or all of them once only, to reach the answer, a randomly generated number). How you can work this out in 30 seconds is beyond me.
ps I always had a bit of a 'thing' for Carol Vorderman. Perhaps it was her skill with numbers.