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Thread: IB Maths Marathon

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    IB Maths Marathon








    Answer: a=5, r =1.5
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by davidgoes4wce View Post







    Answer: a=5, r =1.5
    Are you sure the IB is offered by most New South Wales schools? I thought it was relatively uncommon in NSW schools.

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    Re: International Baccalaureate Marathon 2016

    Here was my attempt:







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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by InteGrand View Post
    Are you sure the IB is offered by most New South Wales schools? I thought it was relatively uncommon in NSW schools.
    I should have taken the word 'most' out of it. But I do know that St.Andrews Cathedral and Newington are 2 schools that offer it.
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by InteGrand View Post
    Are you sure the IB is offered by most New South Wales schools? I thought it was relatively uncommon in NSW schools.
    Most rich private schools lel
    Veni, Vidi, Vici

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    Re: International Baccalaureate Marathon 2016







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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by Nailgun View Post
    Most rich private schools lel
    The thing I learnt also, especially in NSW= rich doesn't necessarily mean better.
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by davidgoes4wce View Post
    The thing I learnt also, especially in NSW= rich doesn't necessarily mean better.
    words to live by
    Veni, Vidi, Vici

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    Re: International Baccalaureate Marathon 2016

    I also get the feeling this question has substitution and cancelling involved, would be great if somebody can get the derived working out as I spent around 15-20 minutes on the question.
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by InteGrand View Post
    Are you sure the IB is offered by most New South Wales schools? I thought it was relatively uncommon in NSW schools.
    some
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by davidgoes4wce View Post
    I should have taken the word 'most' out of it. But I do know that St.Andrews Cathedral and Newington are 2 schools that offer it.
    Trinity Grammar, MLC, Ravenswood, Kambala, Queenswood, Monte Sant Angelo, S.C.E.G.G.S. Redlands, . . . .
    Last edited by Drongoski; 19 Jun 2016 at 11:04 PM.
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by davidgoes4wce View Post







    Answer: a=5, r =1.5
    ar³ = 135/8 from the difference of the series.

    a(1+r+r²+r³) = 205/8

    1+r⁻¹+r⁻²+r⁻³ = 41/27

    which is the quotient of the above two expressions.

    From here, it can be solved for r⁻¹ and then a can be found.
    davidgoes4wce likes this.
    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: International Baccalaureate Marathon 2016

    Quote Originally Posted by Paradoxica View Post
    ar³ = 135/8 from the difference of the series.

    a(1+r+r²+r³) = 205/8

    1+r⁻¹+r⁻²+r⁻³ = 41/27

    which is the quotient of the above two expressions.

    From here, it can be solved for r⁻¹ and then a can be found.
    You did everything right except for that last line

    1+r^-1+r^-2+r^-3=65/27

    It's been a long day, and you had to do the division, which correctly pointed out. This is the kind of question they put to a Year 11, I think after today I will just stick to the Haeese textbooks (which are considerably easier).
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    Re: International Baccalaureate Marathon 2016













    From there you have to use Trial and Error to solve for r or a graphics calculating facility (where they have Equation Solver )
    Last edited by davidgoes4wce; 19 Jun 2016 at 10:58 PM.
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    Re: International Baccalaureate Marathon 2016

    This is a Band 6 Question in IB maths..........................In IB they have 7 bands
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by davidgoes4wce View Post
    This is a Band 6 Question in IB maths..........................In IB they have 7 bands
    what fun.
    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: International Baccalaureate Marathon 2016

    Quote Originally Posted by Paradoxica View Post
    what fun.
    Just Saying
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    Re: International Baccalaureate Marathon 2016

    What do you reckon is harder, NSW maths or IB maths?
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by Rathin View Post
    What do you reckon is harder, NSW maths or IB maths?
    Does this really have to be asked

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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by leehuan View Post
    Does this really have to be asked
    Do you mean the answer is obvious, or the question isn't of interest?
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    Re: International Baccalaureate Marathon 2016

    im just curious lol
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    Re: International Baccalaureate Marathon 2016

    My legal teacher full roasts us on how dumb we are and how much 'better' the IB kids are and whatnot...
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    Re: International Baccalaureate Marathon 2016

    Quote Originally Posted by InteGrand View Post
    Do you mean the answer is obvious, or the question isn't of interest?
    The former haha

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    Re: International Baccalaureate Marathon 2016

    The IB is a more rigorous and demanding programme than the NSW HSC.

    You can't just pick a group of any subjects that you fancy from a menu of 100 items. If you choose the IB Maths (HL), and opted for the "Calculus" [previously called the 'Series & Differential Equations'], as most schools here do, you have to do: Sequences & Series [and their convergence/divergence, Squeeze Thm, L'Hopital's, etc ], Improper Integrals, Power Series, Maclaurin & Taylor series, Error Term, Radius and Interval of Covergence etc, Differential Equations etc.

    The core course includes: vectors, dot and cross product, and Equations (vector, parametric, Cartesian) of a line, a plane , their intersection, solution sets to a set of linear equations in x, y, z.
    Last edited by Drongoski; 20 Jun 2016 at 12:28 AM.
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    Re: International Baccalaureate Marathon 2016

    I think I'll be honest, if you read the Haeese Maths textbooks (which are published in Adelaide), you would say the NSW curriculum is harder.

    Let's not kid ourselves, doing an international recognised curriculum you would generally expect the standards to be alot higher.

    IB Maths November 2014
    Maths Studies Candidates 2455
    Maths SL Candidates 4093
    Maths HL candidates 1333

    IB Maths May 2014
    Maths Studies 29,235
    Maths SL 38,926
    Maths HL 11,484

    From what I gather there are two testing seasons one in May and one in November. From what I gather , is that the students in Australia prepare for the November exam. Whereas the Northern Hemisphere counterparts have to prepare for the May.

    Australia has the largest intake participation in November according to the IB website with 1916/11125=17.22% candidates participating.

    United States of America has the largest intake participation in May according to the IB Website with 73,028/137,330=53.17% candidates participating.
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