Database of erudition questions and answers

Hello! We're developing an erudition game (like "Who wants to be a millionaire") where are required questions with different levels of difficulty, and also 4 choices of answers (1 is right, 3 are wrong). Questions can be about anything - starting from hystorical facts and geography till the art and politic. They can be: 1) text (like "What is capital of Italy?"), 2) picture (like "Which country owns mentioned flag?"), 3) video or audio (like "From which movie is this part?"), 4) in any other creative way. :) Like title says - it's an erudition game and questions should be from elementary level till really hard. Also I need a source for the most of answers (to prove that it's the right one) - WEB page, book, educational stuff etc. Question can be in English, also in Latvian or Russian. If you'll be able to show creativity and accuracy (texts shouldn't have any spelling errors or so), our cooperation could be long. In your offer please mention costs and necessary time for preparing 100 questions (10 different levels of difficulty). Thanks! Andris G.