Yeah i'm taking the maths test again at stage 3 this wed, a guy that did the same thing last week said it's a different paper (as you would expect), but the main concern for me was that he said he took the test last thing in the afternoon (after both the group discussion and the interview).
In otherwords, when your brain aint gonna be at its freshest... i thought it would've made more sense to do it while others were getting thier interviews directly after lunch. maybe this guy was unlucky, i dunno, anyways i'll let you know what happens for me...