A mental warm-up.

I also suggest devising a system for determining the winner if there will be one. Here's my idea: Determine three difficulty levels for the questions, based on how many people solved each one, and award points accordingly: 3, 2, or 1 point. For example: One person guesses correctly - 3 points; 2-3 people guess correctly - 2 points; the rest - 1 point. Or (if many people guess correctly): 1-3 people guess correctly - 3 points; 4-6 - 2 points; the rest - 1 point. Something like that. Alternatively, the answers could just be kept, and no competition is held at all, allowing anyone who wants to guess later, just for fun. And when Vic gets tired of confirming the correctness of answers in private messages, a list of who guessed what can be posted, and people can ask those who already know the answers in private messages. (And all the questions and the list of people who know the answers can be in the first post of the thread, for example).