TriviaJerk Challenge 10 revisited

TriviaJerk.com asks the most difficult and obscure trivia questions on the net, but actually awards real cash prizes to the first person who answers correctly! It’s completely free to play and absolutely no registration is required; participants answer via comments. Prizes vary from Challenge to Challenge, and will grow in value relative to the site’s growth (so increased traffic really is a win-win). The current Challenge is worth $50.