Ok, this is just a little embarrassing. I took a few more shots than I should have on quite an easy question and with each try it counted down the number of attempts left from 10. I got it in the end (I am muppet for taking so long on it) but I got another, harder question wrong later and it resumed the countdown attempts from where I was before. My tutor said you get a set number of attempts per question but I am apprehensive about the later units grinding me down.