Suggested Answers to the HSC 2016 Mathematics Exam (+Discussion!)

[jamonwindeyer]

What will a 95-98 scale to?? or does it stay the same?

Might shift up a point or two in that range, but nothing excessive!

[itsAnuu]

What will a 95-98 scale to?? or does it stay the same?

96-99

[fizzy.123]

what will a raw mark of 80 scale up to?

[jamonwindeyer]

Not really sure, I found it harder than 2014 and 2015 by a lot because I've done lots of past papers but never seen like 2 of those multiple choice before and the yabby question was really tricky, so was the probability with the wording.

I think what was difficult this year wasn't like, the absolute level of 'hardness' of the questions. Because examined in isolation, they are not terrible. But collectively the paper is different, that's for sure, and that definitely throws a spanner in the works

[jamonwindeyer]

what will a raw mark of 80 scale up to?

Higher 80's, just shy of 90 probably

[pikachu975]

With my expanding method for the yabbies to get y = 100, if I didn't test or show nature would I lose a mark?

[wesadora]

wanna neck myself for thinking 19e^0 = 0 and screwing the Q16 range up...as well as forgetting period of tan(nx) is pi/n not 2pi/n   
pretty good paper overall tho

also didn't notice for the die rolling it had to be (7/8)^n-1 not just (7/8)^n -_______- tricky.......

[jamonwindeyer]

With my expanding method for the yabbies to get y = 100, if I didn't test or show nature would I lose a mark?

The thing that confuses me here is that there is 2 marks allocated; thats low. Further, earlier in the exam, they specifically asked for justification (a first). So I think you'd be okay!

[kb123]

so that's how Q9 works... i was so confused

[jamonwindeyer]

so that's how Q9 works... i was so confused

Was probably the strangest of the Multiple Choice

[kb123]

for Q16 (a) (iv), how does the absolute value part work?

[kb123]

For Q 16 b (iv)

I just used axis of symmetry since dy/dt is a quadratic, instead of differentiating it. Much easier.

[pikachu975]

Was probably the strangest of the Multiple Choice

Yeah gg I calculated the height of one of the triangles wrong so I got the wrong area....

[kb123]

Yeah gg I calculated the height of one of the triangles wrong so I got the wrong area....

I just took the integral disregarding the absolute value lol

[jamonwindeyer]

For Q 16 b (iv)

I just used axis of symmetry since dy/dt is a quadratic, instead of differentiating it. Much easier.

Ahhhh clever clever!!

for Q16 (a) (iv), how does the absolute value part work?

Basically the area in that section yields a negative, but we don't want that! So we just take the same thing, but positive