Kitkat
There is a whole maths based paper, so you'll have to answer about 25-30 if I remember correctly. They are mostly SDT questions, though they throw in a few others like working out compass headings as well. Most were very straight forward, though some were a little more complicated (either due to slightly awkward division, or because they flood you with info you don't actually need in the question to try and confuse you a little bit).
Don't worry too much, none of these were hard mathematically... but the time limit on this paper was very tight so the quicker your mental arithmatic the better.