IT'S the ultimate clash of mathematical skill and literary knowledge that tests contestants to the very edge of their limits.
But despite Countdown celebrating its 40th anniversary this year, it still has a number of behind-the-scenes secrets unknown to most viewers decades on.
The game show was watched by more than four million people at its peak and launched the careers of Carol Vorderman, Rachel Riley and Susie Dent.
To get the inside scoop The Sun spoke to former contestant Gary Woodward, who has appeared on Countdown nine times, and a TV source.
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