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Thread: Australian Maths Competition

  1. #76
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    Re: Australian Mathematics Competition

    I reckon more like 70-80 for yr 12 and 60-70 for yr 11. I reckon the Senior Division was harder than past Senior Divisions
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    Re: How did u go in the Australian Maths Competition?

    Quote Originally Posted by maths94 View Post
    today (6-8-09) i did my intermediate AMC test.This is just a thread to see which question u were stuck on ...q26-30:@ i need help on dem,, and ye just a general chat on how u went in the AMC test.
    Here is my solution to 26 for ya =)








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    Re: How did people go in the maths comp today?

    Quote Originally Posted by kurt.physics View Post
    No ;P

    Could you post them possibly? (some of them could be the same so perhaps you could just kinda explain which ones or something)
    Umm, I remember 27 so I'll try explaining that one.

    27. A number is called Ascending if the digits are increasing. Eg. 123 and 2356 is ascending but 749 or 7799 is not. Find a 3 digit number that is Ascending and also has the property that 6n where n is the number is Ascending.
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    Re: How did u go in the Australian Maths Competition?

    this is bs lol, i worked it out just like kurt.physics but instead of taking 1 off of x at the end i added it. and for question 29, im fairly sure that i got it right, but even if i did, it won't matter because i put that answer in the box for question 30.

    oh noes, all the answers that i thought were right suddenly seem like they were wrong.
    Last edited by TheJuggernaut; 6 Aug 2009 at 5:17 PM.
    '09
    prelim mathematics, ext1 :rofl:
    the rest of year 10

    '10, '11
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    sd & d

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    2009 AMT Mathematics Competition

    How was it? I personally found it harder than earlier years.
    Feel free to discuss the test or any of the questions.
    Did anyone confidently solve the last 5 questions?
    '10: Maths4uAdvEngChemistryPhysicsBiology


    plz give me a 95+


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    Re: 2009 AMT Mathematics Competition

    Quote Originally Posted by spammy679 View Post
    How was it? I personally found it harder than earlier years.
    Feel free to discuss the test or any of the questions.
    Did anyone confidently solve the last 5 questions?
    The Westpac comp yeh?

    Yeh, I did the Senior Divison and I found that it was really difficult compared to past senior papers.

    I'm confident I got 26 and 27 correct.
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    Re: 2009 AMT Mathematics Competition

    Quote Originally Posted by Official View Post
    The Westpac comp yeh?

    Yeh, I did the Senior Divison and I found that it was really difficult compared to past senior papers.

    I'm confident I got 26 and 27 correct.
    How did you solve 27?

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    Re: 2009 AMT Mathematics Competition

    Quote Originally Posted by kurt.physics View Post
    How did you solve 27?
    Well I knew the last digit of the answer had to be a relatively large number because it is an Ascending number. So I assumed that the last digit of n had to be 8. (6*8) = 48, has 8 as a last digit.

    From that step, I pretty much used trial and error of 3 digit numbers, keeping 8 as the last digit. Eventually, I came to the solution: 578. 578 * 6 = 3468, which is also an Ascending number.
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    Re: How did people go in the maths comp today?

    it was easier than last year's. I'm scared the machine won't be able to read my answers, because I didn't colour dark enough.
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    Re: How did people go in the maths comp today?

    Official did you have the rabit question in your exam, i got the minimum number of rabits is 31. Did you get this?
    Last edited by kurt.physics; 8 Aug 2009 at 2:03 PM.


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    Re: 2009 AMT Mathematics Competition

    nice, Official. I almost got that except I gave up when I got to 570.
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    Re: 2009 AMT Mathematics Competition

    Quote Originally Posted by nerdsforever View Post
    nice, Official. I almost got that except I gave up when I got to 570.
    Yeh, nice. For that question i cbf even trying, I despise brute force!!!

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    Re: How did people go in the maths comp today?

    Quote Originally Posted by kurt.physics View Post
    Official did you have the rabit question in your exam, i got the minimum number of rabits is 15. Did you get this?
    Oh, nope sorry, I didn't have that question.
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    Re: 2009 AMT Mathematics Competition

    I only got one out of the last 5...question 27 was 578. I firstly ruled out the numbers that couldn't be at the end or middle and then it boiled down to a possibilty of like 10 which I tested and only one worked.
    Commerce (Finance) / Science (Advanced Mathematics) (Quantitative Risk) @ UNSW

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    Re: How did u go in the Australian Maths Competition?

    I didn't get any of the last ones but the multiple choice where easier than I expected. Still, I expect i failed.

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    Re: How did people go in the maths comp today?

    Quote Originally Posted by Official View Post
    Oh, nope sorry, I didn't have that question.
    What was the 26 senior question?

  17. #92
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    Re: 2009 AMT Mathematics Competition

    Quote Originally Posted by gurmies View Post
    I only got one out of the last 5...question 27 was 578. I firstly ruled out the numbers that couldn't be at the end or middle and then it boiled down to a possibilty of like 10 which I tested and only one worked.
    Nice . How do you think you went in general, and what do you think the HD cut off will be this year?
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  18. #93
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    Re: How did people go in the maths comp today?

    Quote Originally Posted by kurt.physics View Post
    What was the 26 senior question?
    It was something along the lines of:

    The reciprocal of 4 numbers add up to make a total of 19/20. 3 numbers are in the ratio of 1:2:3. Find the sum of the 4 numbers.

    There could have been more detail but if there was, I can't remember
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    Re: How did people go in the maths comp today?

    integers for question 26...i've got the paper here so I can post any requested questions.
    Commerce (Finance) / Science (Advanced Mathematics) (Quantitative Risk) @ UNSW

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    Junior Member Hypermelon's Avatar
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    Re: How did people go in the maths comp today?

    lol the map question
    my friend actually folded paper for that one

  21. #96
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    Re: How did people go in the maths comp today?

    Quote Originally Posted by Hypermelon View Post
    lol the map question
    my friend actually folded paper for that one
    Same here hehe.
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    Re: How did people go in the maths comp today?

    Can you remember what answers you came to, i got (E)?

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    Re: How did people go in the maths comp today?

    LOL same here. That's one of the ones I got wrong -_-
    Commerce (Finance) / Science (Advanced Mathematics) (Quantitative Risk) @ UNSW

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    Re: How did people go in the maths comp today?

    Quote Originally Posted by kurt.physics View Post
    Can you remember what answers you came to, i got (E)?
    For the map question I got the option where the 3rd letter is W. Besides that I can't remember
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    Re: How did people go in the maths comp today?

    yeah, i folded the map question and i got E.
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