Thank you Jake, I'm amazed at how little code there is for
that!
A couple of questions though - As far as speed goes,
isn't it better to use native css selectors and chain them?
Also: this solution works really well for a click event when you
have the search for checked status only after a button is pressed and
the radio inputs have already been checked by the user. I was hoping
to have the amount of correct answers on the screen the whole time and
have the score change as the user answers questions but this is really
hard to work out!