hello icycokes, I have not filled in/submitted my application yet so here's just a gist of what i think you mean

I am not at all sure about the AO/A Principle thing either, perhaps a fellow lowyat-ian can help clear our doubt on this matter (thanks for pointing that out!)

The closest to Mathematics S is Mathematics in our drop down menu. So I think they are not fussy whether the Maths was for Science or Arts Stream

I am 100% sure that it is not Further Mathematics as that is another different subject altogether. So Mathematics it is!
Ps: I have mixed feelings about a 3.5 cgpa too T_T family & friends convinced me it was good enough. But as tangiers said what's done is done, we can't cry over spilt milk *kicks self for being playful during exam season*
I read in the NUS website that as long as each result gets a B and above you would get a fighting chance with the competition out there. And it also depends on the competition of the course you are applying for. Like even 4 flat with a band 5 muet would be rejected for medicine or pharmacy students.
Assuming you are an arts stream student, the competitive course would be Architecture.
I have read in elsewhere about a CGPA 3.58 and band 4/5 getting inside FASS. I hope this news is comforting to us!

hmm.. i am an arts stream student. so what is the FASS all about? i read in NUS website that it consists of 18 majors. but i would only interested in economics. i know that is quite a demanding course. IF (miracle) i were offered FASS, is it like i have to compete with others very hard in the first year? what if i lose out? that means i have to opt for other courses like psychology etc?
and as well i do not know what can i fill for the 5 choices i have. FASS seems to be the only faculty i can get in.
and i only got a band 4 for my MUET.. 216! (5 more marks to reach band 5)