I used to be really strong in math competitions like this but recently due to other stuff and just plain laziness I've kind of slacked off. This year a pretty early question stumped me, I think it was #14. I'm not supposed to reveal the entire question until the scores come back, but it was something along the lines of:
a, b, c forms an arithmetic sequence. a, c, b forms a geometric sequence. What's the minimum integer value of c?
I just guessed 2, so we'll see how that turns out.