I have been watching a few old episodes of Who Wants to be a Millionaire on Challenge over the last week or two (yes, I lead an exciting life).
It seems that in every episode, the pool of 10 potential contestants usually consists of 9 men and 1 woman. Occasionally 2 women, occasionally all male.
Why is this? I don't think I've ever noticed this in any other TV gameshow, at least not in recent memory. Perhaps I've not been observant enough.
I can't see why Millionaire's format would appeal to men more than women. Apart from the lesser threat of having Chris Tarrant's arm draped across your shoulders.