Don't you draw the Queen of Diamonds

Assignment 1 is nearly all done. I need to look up a few more definitions in the textbook (sequential rationality, rationalizable) and a bit of notation, and I also need to work out if it's possible to put a circle around a number in LaTeX. At the moment I'm making do with $\mathring{number}$, which isn't as clear visually as I'd like. All things considered I'll probably have the assignment finished by lunchtime tomorrow, meaning I'll have no further excuse for not doing that other assignment (a 1500-word essay, srsly) which is also due next week.