Dottie - I think (I really do not know for sure) that there are a few thousands of questions. The numbers in the questions are being changed, but if you understand/remember/know the question than you understand/remember/know the formula and you use it. There is no other explanation for those kids to have the answer before I am done with reading the question. And I am a very, very fast reader smile
Ghost has been involved with Mathcounts for the last two months ONLY. From what I have seen, sprint and countdown are very trainable (sp), target and team require more problem solving. My guy, having no speed prep needed for Mathcounts, has been always better in target and team rounds than in sprint and countdown. Statistically speaking.

Bassetlover - the video is here
https://mathcounts.org/Page.aspx?pid=1446