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June 04, 2024, 10:24:34 am

Author Topic: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)  (Read 35059 times)

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sincetheend

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #45 on: October 26, 2016, 08:42:31 pm »
In regards to rawmarks.info, what does the data mean exactly? I'm interpreting it as the raw mark scaled to what's in the last column for them, is that right? It just seems to be very extreme, with an increase of 29 from 52 to 81 one year in Extension 1 Maths.

RuiAce

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #46 on: October 26, 2016, 08:45:12 pm »
Hey for the last question, finding values of t, I just used distance formula, then differentiated to find stationary points and confirmed with 2nd derivative that it was a min. I still got t= sqrt2 and -sqrt2
Do I get full marks??
Long and tedious approach for a 2 marker but no you would not be penalised.

RuiAce

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #47 on: October 26, 2016, 08:50:19 pm »
In regards to rawmarks.info, what does the data mean exactly? I'm interpreting it as the raw mark scaled to what's in the last column for them, is that right? It just seems to be very extreme, with an increase of 29 from 52 to 81 one year in Extension 1 Maths.
It is extreme. Because fact is, courses such as Mathematics Extension 1 align MASSIVELY. The alignment is so high that it's almost unrealistic but it's not; it is most certainly legitimate.

A raw mark of ____ will align to a mark of ____ as reported on the raw marks database, for that year. The data is collected from people who have bought their raw marks and have chosen to submit it to the database.

sincetheend

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #48 on: October 26, 2016, 08:53:07 pm »
Definitely makes me feel a bit more confident about my atar.

Cindy2k16

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #49 on: October 26, 2016, 09:34:09 pm »
It was.. a pretty awful exam for me.... I didn't deal with the tricky questions well and some of them took me a while to get and others I kept trying to do and didn't get them in the end and had to skip :/ Since some questions took me a little longer to figure out/I kept trying different things to figure out, I even ended up running out of time and couldnt do the last binomial part and the majority of the final locus question (uh though I doubt I would've been able to do it). I wasn't sure if the question was simple and if I spent a little longer on it I would get the answer ._.
Considering how many times I got stumped during the exam I was pretty low on confidence by q14 too. The amount of marks I had to skip automatically puts me at ~80% or lower too (which was my aim...welp)

Probably the only things i could remotely feel alright about is that i got 10/10 on MC i think and i managed to get that weird y=tanx y=cosx perpendicular gradient question after only a short time of severe confusion lol

All in all it was a horrible experience for me haha..time to study for physics and chem now
HSC 2016
English Adv- 89
Maths- 96
Maths Ext - 94
Biology- 94
Chemistry- 90
Physics- 91

ATAR: 98.30

Mei2016

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #50 on: October 26, 2016, 09:43:03 pm »
Ok.... (post-test feeling: was horrible)

My thoughts on the test was... is it just me, or is the parametrics part of Q14 actually hard? (I mean, it is prelim work and I only managed part i) )
-I think I liked the MX2 test better because there was more time...
-I got the first two parts of the binomial q out, but when I tried adding the first two parts together... it just didn't work out...
-The second part to the circle geo was hard to see... (funny how I got the 4 mark circle geo in 4 unit and didn't see this one...)

-And I was just wondering if I'd get a mark taken off for writing in a domain restriction for Q11a) the inverse function... (the root sign bothered me in the test... should've just ignored it...[sigh])

Also, is it advisable to get E4 in MX1 and MX2 to consider doing uni maths? (like level 1141...)

Anonymouse1

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #51 on: October 26, 2016, 10:18:26 pm »
How much would around 75% raw scale for this test?

sincetheend

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #52 on: October 26, 2016, 10:32:36 pm »
How much would around 75% raw scale for this test?

Probably 90+ based on this; http://rawmarks.info/wiki/Mathematics_Extension_1
So an E4.

RuiAce

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #53 on: October 26, 2016, 10:37:39 pm »
It was.. a pretty awful exam for me.... I didn't deal with the tricky questions well and some of them took me a while to get and others I kept trying to do and didn't get them in the end and had to skip :/ Since some questions took me a little longer to figure out/I kept trying different things to figure out, I even ended up running out of time and couldnt do the last binomial part and the majority of the final locus question (uh though I doubt I would've been able to do it). I wasn't sure if the question was simple and if I spent a little longer on it I would get the answer ._.
Considering how many times I got stumped during the exam I was pretty low on confidence by q14 too. The amount of marks I had to skip automatically puts me at ~80% or lower too (which was my aim...welp)

Probably the only things i could remotely feel alright about is that i got 10/10 on MC i think and i managed to get that weird y=tanx y=cosx perpendicular gradient question after only a short time of severe confusion lol

All in all it was a horrible experience for me haha..time to study for physics and chem now
Tbh the bulk of the paper's difficulty WAS in its trickiness. On a broad scale it wasn't that bad but some subtleties were meh. Also a bit of time management i guess; never spend too long on the same question.

It can be annoying though, being disappointed by the paper to the point that your motivation for Q14 drops a bit. Not much can be said there though unfortunately, that's for each and every person.

But yeah, definitely focus on the remaining exams now
Ok.... (post-test feeling: was horrible)

My thoughts on the test was... is it just me, or is the parametrics part of Q14 actually hard? (I mean, it is prelim work and I only managed part i) )
-I think I liked the MX2 test better because there was more time...
-I got the first two parts of the binomial q out, but when I tried adding the first two parts together... it just didn't work out...
-The second part to the circle geo was hard to see... (funny how I got the 4 mark circle geo in 4 unit and didn't see this one...)

-And I was just wondering if I'd get a mark taken off for writing in a domain restriction for Q11a) the inverse function... (the root sign bothered me in the test... should've just ignored it...[sigh])

Also, is it advisable to get E4 in MX1 and MX2 to consider doing uni maths? (like level 1141...)

A twist was there in the last part of the parametrics but I don't know about hard. Probably more peculiar than the norm but it only really required breaking it down. That being said that's important though; Q14 is usually about breaking things down and then building it all back up.

MX1 is shorter (and the paper's smaller) mainly because there just isn't that much stuff in the course to cover.

Yeah, that was not an add. That was a subtract. The trick with binomial was, like said, to eliminate the 2n-1

A generous marker won't care, but yeah that was a cube root.


The preference for MATH1141 is to have a combined mark of at least 175 between MX1 and MX2. Which is roughly E4 in both but there's a bit of breathing room if you barely miss it. But these are recommendations - it's ultimately your own skill that matters.

How much would around 75% raw scale for this test?

I don't expect it to be that much different to 2015, but maybe a tiny bit better. See the raw marks database for the historical data but I only compare with a basis.

Anonymouse1

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #54 on: October 26, 2016, 11:10:24 pm »
wow 90+? thats insane! does anyone have the band 6 cutoffs from 2015?

And personally 2015 was my favourite paper, while doing it timed i got 93 with about 40 mins to spare.. The questions were direct, but this year they curved around the question alot and asked you to do like 10 things before getting to the actual core of the question. In my opinion, I felt like 2016 was one of the hardest papers.

edmododragon

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #55 on: October 27, 2016, 10:21:50 pm »
I have to say, I didn't expect to have to use the reference sheet at all, but short cutting the equations of the tangents and normals in the last question was quite a timesaver

RuiAce

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #56 on: October 27, 2016, 10:23:30 pm »
I have to say, I didn't expect to have to use the reference sheet at all, but short cutting the equations of the tangents and normals in the last question was quite a timesaver
I laughed when I realised that the formula sheet would actually come in handy for parametrics.