I was going to post all of the problems, then answer some later. I only posted 11 because I wanted to go do something else, but I'll post more later (and I skipped 2 since it had a diagram that I could not describe without giving away the solution). I decided AMC 12 might be better to post than AMC 12.
I'm copy-pasting the problems from http://www.theartofproblemsolving.com
. I do my best to not look at the solution (the problem and solution are on the same page) and copy/paste the problem on here, inserting LaTeX where necessary. If you want to check your answers, I suggest going there. Solutions to the problems are included on there, but I suggest at least attempting the problem first, and don't post the solution if you didn't come up with it, please.
Also, use LaTeX as it makes it a bit easier to read. Instead of bolding your answer in large font, boxing in LaTeX is better; [unparseable or potentially dangerous latex formula] works.