Maths Extension 2 Predictions/Thoughts (3 Viewers)

[BionicMango]

bro what is the big deal of question 7 question? it's just a sketching question lol
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I did all these questions without the use of calculations lol

How did you do q7 without sketching? I feel like I wouldn’t trust myself with sketches for questions like q7 tbh
I drew a triangle with each side 3,5,7 then cosine ruled it

 

[BionicMango]

Taking advantage of multiple choice is definitely worth it, but I don’t get the rhombus one, since they are all parallelograms? I drew one, and noticed that the diagonals are perpendicular but unequal (the i and the k respectively) = rhombus

edit: q9 not q7

 

[BionicMango]

Actually for question 16 what I did was prove the shortest distance was perpendicular FIRST by drawing a right triangle and saying that the legs are always shorter than the hypotenuse (you can prove it using Pythagoras’ theorem), thus perpendicular lines represent the smallest distance.
I then used that idea in part a and saved a whole lot of time.

 

[cheesynooby]

A a rectangle is a parallelogram, which is like a square. Odd one out is a fucking rhombus (which was correct)

C is a rhombus is a parallelogram, which is like a square. Odd out out is a rectangle (which was not correct :0)
A a rectangle is a parallelogram, which is like a rhombus. Odd out out is a square (which was not correct :0)
Every other option is a parallelogram. Odd out out is a parallelogram (which was not correct :0)

 

[coolcat6778]

16a said or otherwise. here is or otherwise method

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what do you think happens at the marking centre when a marker can't interpret this?

 

[tywebb]

what do you think happens at the marking centre when a marker can't interpret this?

then they shouldn't say or otherwise in question if they are too stupid to understand or otherwise method.

 

[coolcat6778]

nah I think the marker just asks chatgpt to determine if it the solution is correct

 

[tywebb]

chatgpt isn't reliable for checking because it isn't as robust as other older and more trustworthy technologies such as calculator, wolframalpha, spreadsheets, etc. so i don't think they would do that

ai got off to a bad start being very bad at maths. it's been getting better but not to the point that it could be relied upon for checking.

 

[BionicMango]

Don’t teachers mark it even though they don’t set the question?

 

[barnyard]

chatgpt isn't reliable for checking because it isn't as robust as other older and more trustworthy technologies such as calculator, wolframalpha, spreadsheets, etc. so i don't think they would do that

ai got off to a bad start being very bad at maths. it's been getting better but not to the point that it could be relied upon for checking.

i think it was a joke

 

[tywebb]

i wanna know when nesa doing presentation for hsc marking.

usually it is last saturday in february of following year, and in recent years it is 9am, guthrie theatre at UTS.

i know now where it gonna be

it ain’t gonna be at uts

it is 9am, feb 21, 2026 at macquarie theatre, macquarie university

who going?

 

[BionicMango]

What’s it about and can anyone go?

 

[tywebb]

What’s it about and can anyone go?

they do presentation for marking of 2025 hsc maths exams

 

[RedDragonStar1]

i know now where it gonna be

it ain’t gonna be at uts

it is 9am, feb 21, 2026 at macquarie theatre, macquarie university

who going?

If I get into Macquarie then I might go there so I can work out the best route to get there from my place.

 

[coolcat6778]

If I get into Macquarie then I might go there so I can work out the best route to get there from my place.

"get into Macquarie" wdym

 

[RedDragonStar1]

"get into Macquarie" wdym

Like for uni next year, I don't have early entry

 

[Allan Mekisic]

what do you think happens at the marking centre when a marker can't interpret this?

They don’t have marking centres anymore. They scan our answer booklets and email them to individual markers. My understanding is that each booklet is marked by 2 independent markers.

 

[Luca26]

chatgpt isn't reliable for checking because it isn't as robust as other older and more trustworthy technologies such as calculator, wolframalpha, spreadsheets, etc. so i don't think they would do that

ai got off to a bad start being very bad at maths. it's been getting better but not to the point that it could be relied upon for checking.

Other methods that are more reliable than AI... asking another marker or a colleague / teacher... looking methods up in suitable reference sources... asking one of the English teachers... asking a random person on the street... holding a seance to ask Isaac Newton... sacrificing a chicken and studying its entrails...

 

[Luca26]

For anyone who hasn't seen it, here is an X1 question from NSBHS 2025 Trial and its AI answer on the school's set of solutions...

It illustrates an AI providing a confidently-expressed and fundamentally-flawed (and objectively unreasonable) answer to a pretty easy X1-level question.

 

[Jackmmmmmmmmmmmmmmmmmmmmm]

What do you guys think a raw 66 or 68 will align to?