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Australian Maths Competition (4 Viewers)
- Thread starter maths94
- Start date
RealiseNothing
what is that?It is Cowpea
RealiseNothing
what is that?It is Cowpea
Re: Australian Maths Competition 2013
I'm not sure how correct my method is, but I considered the ratio of the volumes first (1:8). From here, I tested each of the answers. For example (c) was 1:3, which means the smaller sphere would have been divided into quarters so to speak (1 quarter and 3 quarters). Then from here I multiplied by 8 or something and tried to see which ratio seemed like it would work.
hayabusaboston
Well-Known Member
Re: Australian Maths Competition 2013
I combined their volumes and considered individual volume ratios with 1:8, ended up with 1:3
Makematics
Well-Known Member
Re: Australian Maths Competition 2013
yeh i did the probability one doing cases based on where the first shot hit. in total there should have been cases, but i fkn missed one in the exam which is why my answer was off -.- eff... and yes i know i overcomplicated.
yeh i did the probability one doing cases based on where the first shot hit. in total there should have been cases, but i fkn missed one in the exam which is why my answer was off -.- eff... and yes i know i overcomplicated.
Makematics
Well-Known Member
Re: Australian Maths Competition 2013
realise do you have the paper?
realise do you have the paper?
RealiseNothing
what is that?It is Cowpea
RealiseNothing
what is that?It is Cowpea
Re: Australian Maths Competition 2013
Just saying, for question 20 which was "how many ways can 2013 be expressed at the sum of two or more consecutive integers", this basically gave you the answer.Prime factorisation is
RealiseNothing
what is that?It is Cowpea
Re: Australian Maths Competition 2013
The amount of ways a number can be expressed as the sum of consecutive integers is the product of the powers of it's prime factors plus one respectively.
Crazylo0pwhole
New Member
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- Aug 2, 2013
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- 2014
Re: Australian Maths Competition 2013
What was the solution to Q28? I wanna check i tried to get that one.
What was the solution to Q28? I wanna check i tried to get that one.
Web Addict
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Crazylo0pwhole
New Member
- Joined
- Aug 2, 2013
- Messages
- 2
- Gender
- Male
- HSC
- 2014
Re: Australian Maths Competition 2013
I think for example 2013 (1x1x1)+1= 2 ways of expressing as a sum of consecutive integers? correct me if i'm wrong
Re: Australian Maths Competition 2013
Hi, does anyone have the questions for the Junior Division paper - last 5 questions? My brother is freaking out because he didn't manage to finish the last 5 and he wants to see whether they were as hard as he expected...if anyone can provide the last 5, it would be greatly appreciated.
Hi, does anyone have the questions for the Junior Division paper - last 5 questions? My brother is freaking out because he didn't manage to finish the last 5 and he wants to see whether they were as hard as he expected...if anyone can provide the last 5, it would be greatly appreciated.
hayabusaboston
Well-Known Member
Re: Australian Maths Competition 2013
Yay ibibah, lets spread the answers to all the questions and bias the results for other kids!
Good idea
Pump up dat HD quantity around australia.
Yay ibibah, lets spread the answers to all the questions and bias the results for other kids!
Good idea
Pump up dat HD quantity around australia.