The CSS-thing is interesting - and something I'm looking at.
Being somewhat anal, I try to get the code basics 'right' rather than relying on css.
My preferred solution is to have the code do the numbering, then perhaps use css to add a color background to alternate answers and thus provide easier differentiation.
I know WP can use a counter variable in the php code, hence my request here.
I've been trying to understand advanced themes, and specifically how the code elements control the published page - but, being non-tech, most of it is beyond my knowledge and I'm finding it hard to grasp.