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  1. Trebla

    BoS trials Maths and Chemistry 2022

    … and here are the results for the 2022 Chemistry BoS Trials! Thank you for your patience and thanks to IAmWinston and edwxnsamuel for helping to mark the papers. As for the results, congrats to the top student who scored 71! :) Once again you are reminded that:
  2. Trebla

    BoS trials Maths and Chemistry 2022

    Hi all, Thank you for your patience. There is one minor loose end to be tied up with the marking, which we hope to resolve soon before releasing the results. However, the marking guidelines have now been written up and can be released to help with your studies. Please find this attached...
  3. Trebla

    y = ln f(x)

    This was in this year's Mathematics Advanced HSC. In my mind, if a composite function graph is examinable in Advanced (which seems to suggest they can even ask to sketch y = ln f(x) in Advanced) what's the point of having all these below in Extension 1? They are literally specific examples of...
  4. Trebla

    y = ln f(x)

    In general, if you are given two graphs of y = f(x) and y = g(x) then you are expected to know how to sketch y = f(g(x)). See this year’s HSC for Advanced.
  5. Trebla

    Do you need to be good at Math??

    Have you checked out the Notes and Resources section of this site?
  6. Trebla

    Mathematics Extension 1 HSC thoughts

    Three points of data (2020-2022) does not imply a trend though. I mean in the past we kept talking about how NESA kept writing boring generic HSC maths exams (with only a handful of interesting challenging content) and now here we are…
  7. Trebla

    Mathematics Extension 1 HSC thoughts

    I 💚 stats
  8. Trebla

    Mathematics Extension 1 HSC thoughts

    Yep. See Q14c) in this year’s BoS trials for Ext2 ;)
  9. Trebla

    Mathematics Extension 1 HSC thoughts

    Correct. Your raw mark branches off into two different types of transformations: - Aligning (for your HSC certificate) - Scaling (for your ATAR)
  10. Trebla

    Mathematics Extension 1 HSC thoughts

    Scaling is applied on raw marks. See below for a high level summary of the process: https://boredofstudies.org/threads/flowchart-of-how-hsc-marks-and-atar-are-determined.390261/
  11. Trebla

    Mathematics Extension 1 HSC thoughts

    Interesting there are two normal approximation questions (and two induction questions for Ext2) when they usually only appear once. This paper is also very overweighted on vector questions lol
  12. Trebla

    BoS trials Maths and Chemistry 2022

    ... and here are the student results for the 2022 Mathematics Extension 1 BoS trials! Apologies for having released this so late 🙏 Once again, thank you to everyone who participated and for your patience! Thanks to the other members of the marking team Paradoxica, dan964 and 1039213 for their...
  13. Trebla

    BoS trials Maths and Chemistry 2022

    Some general feedback comments from me on Q12: In Q12a), a number students stated 196x0.04 as the mean. This is incorrect for a number of reasons - the number itself is not in the right units as a percentage unemployment rate and 4% is the proportion from the one sample of 196, not the...
  14. Trebla

    BoS trials Maths and Chemistry 2022

    Hi all, Unfortunately there has been a delay in the marking for Mathematics Extension 1. Apologies for this. We will try to get this done as soon as possible. However, the solutions have now been written up and can be released to help with your studies. Please also note that the question...
  15. Trebla

    Maths Extension 2 Thoughts and Feelings

    This is because v is defined as velocity in the solution (with upwards defined as positive) instead of speed (which is what most people do). When you define v as speed then you tend to define the direction of motion as positive. This usually makes adding/subtracting the vectors more intuitive as...
  16. Trebla

    Maths Extension 2 Thoughts and Feelings

    I find it interesting that a number of the harder or more unusual questions in Ext2 lately come from topics that existed in the old syllabus. Where were these in the 2010s? In the years before the new syllabus, the HSC exams trended towards being more boring/generic (with a few exceptions) which...
  17. Trebla

    BoS trials Maths and Chemistry 2022

    They’re still being written up. Do you have any specific questions you want answers to?
  18. Trebla

    Mathematics Extension 2 Predictions

    @tgone wtf they actually asked the same question as this in this year’s HSC (with minor variations)….
  19. Trebla

    Mathematics Extension 2 Predictions

    Check out Q6a) from 2005 HSC…
  20. Trebla

    BoS trials Maths and Chemistry 2022

    Some general feedback on the sections I marked for Ext2: Almost 10% of the attendees left at least one question in the multiple choice unanswered. If you don't know the answer to the question, then just guess! You have a 1/4 chance of getting 1 extra mark versus a guaranteed zero. If this was...
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