Discussion and Suggested Solutions - Mathematics 2017

[bimberfairy]

What did people get for the congruent triangles thing? I got x = 45 degrees but I'm not too sure (using tan and drawing new right angled triangles).

I got x= 36 degrees ? Was this the one with three congruent triangles? And the parallel lines? Because i used matching angles of congruent triangles are equal then co-interior angles on parallel lines.

[bimberfairy]

Wasn't it 36 degrees?

Yeah i got 36 degrees

[lcamilleri.53]

What was everyone's thoughts of the multiple choice. I think i changed the locus one from the correct answer when I went back through the exam

[banway]

Ok so question 16 really screwed me over. I, not to sound confident, felt on track to nearly ace the test assuming I made no silly errors the rest of the way through. Then 16 came and with the hour I had to spare it choked me and stumped me entirely.
Seems like many people were the same.
I'll be keen to see the working and paper again to have at it to see what was needed to be done

[Dylpickle01]

Yeah I got 36 too. I was stuck for a bit, then in the last 4 min I scratched together some working to get an answer 

[RuiAce]

\begin{align*}3x^\circ + \left(90^\circ - \frac{x^\circ}{2}\right) &= 180^\circ\\ x&=36^\circ\end{align*}

[jamonwindeyer]

I'm nearly done solutions guys, I'm about an hour in and about to hit Q16. Wayyyy harder than last year, considered as a whole, at least in my opinion. I think it will be a very high cut off compared to what's been seen recently

[_____]

Yeah i got 36 degrees

RIP I used the wrong method

[georgiia]

What did people get for the congruent triangles thing? I got x = 45 degrees but I'm not too sure (using tan and drawing new right angled triangles).

I may be wrong but i think i got 36. I sort of approached it the cheating way by 'assuming' the lines were parallel and showing that by alternate angles it would've been twice the size of the base angles. I'm not sure if that was the correct way to work it out though...

[RuiAce]

I may be wrong but i think i got 36. I sort of approached it the cheating way by 'assuming' the lines were parallel and showing that by alternate angles it would've been twice the size of the base angles. I'm not sure if that was the correct way to work it out though...

Judging by that wording you were meant to assume that they were parallel

[bimberfairy]

What was everyone's thoughts of the multiple choice. I think i changed the locus one from the correct answer when I went back through the exam

I thought multiple choice was pretty good this year!!! I had a hard time with question 9, and did alot of substitution and fiddling around. For the locus, i got it as a circle?

[Zainbow]

I do anticipate that there will be heavier alignment since a lot of candidates found it hard. If it's usually 85 or so then 83 this year is probably a fair call

Best thing I heard all day, I came out of the exam not feeling very confident so I really hope this is true

[herb123]

last years raw for band 6 was 82

[Dylpickle01]

Ok so question 16 really screwed me over. I, not to sound confident, felt on track to nearly ace the test assuming I made no silly errors the rest of the way through. Then 16 came and with the hour I had to spare it choked me and stumped me entirely.
Seems like many people were the same.
I'll be keen to see the working and paper again to have at it to see what was needed to be done

Me too! I felt pretty good with the rest of the paper, then 16 struck. It'll be interesting to see how marks are aligned and moderated considering how most of the cohort felt about it

[georgiia]

Maybe i assumed they were isosceles or something that they said prove and i wrote "assuming ----" then proved it

Judging by that wording you were meant to assume that they were parallel