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This question comes from a past CSSA trial paper. The answer provided is C. I have no idea why that would be the answer, and no solutions are provided for the multiple choice questions. Can someone please explain?

I know it’s a full 0.88cm shorter 😮

Idk everyone’s going to say something different. Every day it seems like I feel differently on it. I think it’s undeniable multiple choice was harder last year, but Q11,12 do seem to be harder this year. Q13 I thought was really easy this year and Q14 I’m unsure about - 2022 was way longer (in...

Okay okay I hear you I'm 171cm or so depending on your measuring tape Which is around 5'7"

Wait wait wait wait wait do you do Advanced Computing at USyd?

Maybe? but if all goes to plan only starting in 2025

Agreed, but I think that’s generally the case in HSC. It’s not Putnam - the questions aren’t exceptionally difficult - but we do have quite a few of them for three hours and they make you think. I think the hardest part of the graphing question was realising that the condition given wasn’t...

Okay this is really interesting - I don't think you're correct but you've found something interesting and probably worth discussing. The first thing to note is that the dotted line in the screenshot is labelled y=\frac{-x}{cos(\theta)}. That means that the point (-1, -1) isn't on the line at...

Fair enough! Maybe in future years it should become more of a thing to publicise errors in papers (hint hint class of 24...)

Very fair point lol well I guess the question is answered for anyone who needs it in the future and the question was asked 5 mins before the exam so … not really sure what to say?

Look I think you’re right - at the end of the day this comes down to definitions in a way. as far as I’m aware, NESA does not provide a definition of the perpendicularity of vectors. If we define perpendicular vectors as pairs of vectors whose dot product is 0, then B would be the correct...

I know you did not write this letter and this isn't directed at you, but I do want to discuss what it says. I've been saying on this forum that the most important thing is that your opinion is informed and evaluative, rather than impulsive and emotional. The wording in this letter seems at least...

Pretty much because people who support Ukraine but not Hamas (including myself) believe the situation is not analogous. If you perform some research, you will note that Putin openly declared his intentions and actions as an invasion of Ukraine before the world got on Ukraine's side - here, Hamas...

Oh nvm got it

Can you elaborate? Not sure which equation you’re saying is wrong and which sides you’re substituting into

Here’s how I would do it: - Substitute x=1 into the given equation - Then on the LHS, invoke the symmetry property of Pascal’s Triangle (m choose k = m choose m-k for all appropriate m and k) on only the terms of the form 2n choose k, where k>n. - Then add 2n choose n to both sides and divide...

Lol all good - everyone's done a 3-2=0 before! I completely understand your view on the multiple choice questions but I personally do actually like it - I think that it tests for your understanding in a way that written questions can't, and doesn't just make you perform a 3-4 mark calculation...

I'd probably relabel to 'attempt' rather than 'sols' as epicmaths made it clear that he was just trying to complete the paper under exam-style conditions.

Look I think this neatly fits into the category of "getting outraged based on what you hear". I'm not too familiar with the 'white phosphorous' situation myself and urge you and anyone else to do your own research, but I have looked a little into it now and this is what I've found: - Firstly...

Look if you've all agreed to end this conversation I really don't want to drag it on but all I'll say is this is a complicated situation and while you have the right to an opinion, you also have an obligation to ensure your opinion is well-researched and accounts for the nuance at play. When you...