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    Re: BoS Maths Trials 2018

    Imao always that one integral in question 11a rip
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    Re: BoS Maths Trials 2018

    Hows the food? Stuck at Uni with no free food
    l’appel du vide


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    Re: BoS Maths Trials 2018

    Quote Originally Posted by BLIT2014 View Post
    Hows the food? Stuck at Uni with no free food
    Unlucky, the food was great. Subway.
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Drdusk View Post
    Unlucky, the food was great. Subway.
    What's the CQ city campus like? I've walked passed it so many times and have always been curious.
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by BLIT2014 View Post
    What's the CQ city campus like? I've walked passed it so many times and have always been curious.
    It was actually quite a small uni, at least much smaller than I expected.
    The rooms looked nice and tidy, but the floor was quite small tbh. Felt more like an office building than a Uni
    Last edited by Drdusk; 8 Oct 2018 at 9:19 PM.
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by BLIT2014 View Post
    What's the CQ city campus like? I've walked passed it so many times and have always been curious.
    The toilet of the second floor is comparable to USYD Carslaw
    If I am a conic section, then my e = ∞

    Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.

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    Re: BoS Maths Trials 2018

    Thanks to everyone that attended on the day! Hopefully you guys got some decent practice out of some challenging and interesting questions. The papers are attached below. Please note that they have incorporated some minor feedback on the day so they may differ slightly to the hard copy you have.

    Massive thanks to Carrotsticks, Paradoxica, calamebe, jjlim7 and ml125 for helping supervise on the day. Also big thanks to the staff from CQU and iStudy for helping to organise the venue.

    We will begin the process of solution writing and marking in the next few weeks and will upload these in due course (before your first maths exam of course!).

    In the meantime, if you want any hints/guides on specific questions or just want to discuss the paper feel free to post in this thread. Keen to hear your thoughts on both the papers. Were there any questions you particularly liked? How was the difficulty in general and in comparison to previous years (if you attempted those)?
    Attached Files Attached Files
    Last edited by Trebla; 29 Oct 2018 at 12:08 AM.

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    Re: BoS Maths Trials 2018

    why everyone skip q16 ;_;
    If I am a conic section, then my e = ∞

    Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.

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    Re: BoS Maths Trials 2018

    Both the papers were challenging and orginal in their own ways. Questions such as the milk one in 3u and non-uniform circular which turned into a projectile were both creative and challenging. Thanks again for an amazing day, never gonna forget being humiliated that much!!!!!

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    Re: BoS Maths Trials 2018

    I forgot the projectile motion equations, and I knew how to do the question as well which just makes me even more sad

    I did some of 16, like 2 parts.
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Paradoxica View Post
    why everyone skip q16 ;_;
    Probably cause half of us got so demoralised from being unable to do Q11a
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Trebla View Post
    Thanks to everyone that attended on the day! Hopefully you guys got some decent practice out of some challenging and interesting questions. The papers are attached below. Please note that they have incorporated some minor feedback on the day so they may differ slightly to the hard copy you have.

    Massive thanks to Carrotsticks, Paradoxica, calamebe, jjlim7 and ml125 for helping supervise on the day. Also big thanks to the staff from CQU and iStudy for helping to organise the venue.

    We will begin the process of solution writing and marking in the next few weeks and will upload these in due course (before your first maths exam of course!).

    In the meantime, if you want any hints/guides on specific questions or just want to discuss the paper feel free to post in this thread. Keen to hear your thoughts on both the papers. Were there any questions you particularly liked? How was the difficulty in general and in comparison to previous years (if you attempted those)?
    Where's my invite TT

    I bet Carrotsticks made Q16 (a), looks like his stuff

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    Re: BoS Maths Trials 2018

    Would it be right to say for the induction question, in the proving step you are required to prove its true for 2^(k+1) people.
    = 2*(2^k)
    =2^k + 2^k, but by assumption P1 always wins for 2^k people, hence he must win if another 2^k people are added.

    Is that the correct way of doing it because I have no idea imao.
    2018 hsc thank god its over

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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Drdusk View Post
    Would it be right to say for the induction question, in the proving step you are required to prove its true for 2^(k+1) people.
    = 2*(2^k)
    =2^k + 2^k, but by assumption P1 always wins for 2^k people, hence he must win if another 2^k people are added.

    Is that the correct way of doing it because I have no idea imao.
    i don't think u can make that assumption; after one turn (or rotation) for 2^k+1 player we get the exact case for 2^k player; as half of the player are removed+starting from same spot because of the fact that it is an even number.

    This is very close of the content ive seen in maths competitions lol
    still did shit
    Last edited by mrbunton; 10 Oct 2018 at 11:21 PM.
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by mrbunton View Post
    i don't think u can make that assumption; after one turn (or rotation) for 2^k+1 player we get the exact case for 2^k player; as half of the player are removed+starting from same spot because of the fact that it is an even number.

    This is very close of the content ive seen in maths competitions lol
    still did shit
    Yeah if we get the exact same case as 2^k players, cant we just use our assumption where we assumed that P1 always wins for (m=k) 2^k players, and hence it would be true by induction
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Paradoxica View Post
    why everyone skip q16 ;_;
    Did anyone draw anything on their papers?
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    Re: BoS Maths Trials 2018

    Quote Originally Posted by BLIT2014 View Post
    Did anyone draw anything on their papers?
    I believe the correct question would be did anyone have a q16 to hand in at all. And we had less than half of them attempted.
    If I am a conic section, then my e = ∞

    Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.

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    Re: BoS Maths Trials 2018

    Quote Originally Posted by Paradoxica View Post
    I believe the correct question would be did anyone have a q16 to hand in at all. And we had less than half of them attempted.


    but how do u do q16 a) i) because the equations given is independent of n, which doesn't make sense for me; eg if k=1; then with n=10 prob of winning is 1/10 while with n=3 it's 1/3.
    Last edited by mrbunton; 11 Oct 2018 at 3:12 PM.

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    Re: BoS Maths Trials 2018

    Quote Originally Posted by mrbunton View Post


    but how do u do q16 a) i) because it seems independent of n which doesn't make sense for me; eg if k=1; then with n=10 prob of winning is 1/10 while with n=3 it's 1/3.
    what do you mean? you just replace n with k, they're just variables.
    If I am a conic section, then my e = ∞

    Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.

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    Re: BoS Maths Trials 2018

    it seems like the probability of winning on the kth term in dependant on both the amount of cards (n) and the intended turn (k). it doesn't make sense to replace n with k if what im saying is correct.

    EDIT:
    " Suppose the bag begins with only three cards labelled 1, 2 and 3."
    ops i didn't read that part; essentially n is set from what im intending to say above; now it makes sense.
    Last edited by mrbunton; 11 Oct 2018 at 9:12 PM.

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    Re: BoS Maths Trials 2018

    Quote Originally Posted by mrbunton View Post
    it seems like the probability of winning on the kth term in dependant on both the amount of cards (n) and the intended turn (k). it doesn't make sense to replace n with k if what im saying is correct.
    The number of cards on the nth turn is n+2.
    If I am a conic section, then my e = ∞

    Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.

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    Re: BoS Maths Trials 2018

    I loved the 4U paper but it didn't seem as difficult compared to the previous years. I had a lot of fun doing question 16 especially.

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    Re: BoS Maths Trials 2018

    Quote Originally Posted by avatarfahaad View Post
    I loved the 4U paper but it didn't seem as difficult compared to the previous years. I had a lot of fun doing question 16 especially.
    You just single-handedly doomed the 2019 BOS Trial cohort. Thanks for the inspiration. Good job.

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    Re: BoS Maths Trials 2018

    Honestly if anyone passes either of them, they pretty much can guarantee a state rank. Thank god this is not the hsc lmaoooooo
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    Re: BoS Maths Trials 2018

    Loll, we will see next year How hard these can get xd

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