I was on the show back in the 80s. I took the test there at the studios, it was helpful in a large number of cases when they gave the questions as "What is an ..." because that let me know that the right answer had to start with a vowel. Unfortunately, I didn't win, one of the Double Jeopardy categories was "German Composers", and classical music is my downfall. I came in second, won a bunch of crappy prizes (including women's clothes, which, surprise, I don't wear. :) ) I did win a trip to Puerto Vallarta, though.