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tywebb

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1st 3 questions for 2024 imo:
imo 2024 q-1-3.png
australian contestants:
australian imo2024 contestants.png
only half done so far so 3 more questions coming later and should be very soon
 
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tywebb

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here is 4-6
IMG_5148.png
and the 6 questions have been put together in a single pdf file attached
 

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tywebb

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btw, did you know that next year the imo will for the first time since 1988 be held in Australia.

This time it will be in Melbourne. In 1988 it was in Canberra.
 

tywebb

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so how about older imo solutions?

imo compendium 1959-2009 available as ebook. website: https://imomath.com ebook: https://link.springer.com/book/10.1007/978-1-4419-9854-5 not free though €71.68

then the shortlists with solutions available for free 2006-2022 at https://www.imo-official.org/problems.aspx and the 2023 shortlist with solutions will be there in a few days (after the conclusion of 2024 imo which is officially July 22 UK time). Nevertheless Evan Chen has 2023 solutions at https://web.evanchen.cc/exams/IMO-2023-notes.pdf
 
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tywebb

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going through all 9 pages there are a lot of 0s for P3 and P6 - negatively impacting on medal cutoffs

ones to watch: 2 potential perfect scorers from china - CHN4 and CHN5, especially CHN4 who already got 7 for both P3 and P6!
china partial.png
but in all 9 pages there are only 2 with 35 so far - which means there can only be at most 2 perfect scorers.
 
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tywebb

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hard to predict what will happen and although china is doing really well, so far usa is beating china on points with 162 so far vs. china's 157:
usa partial.png
 

tywebb

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Turns out there was 1 perfect scorer from China, Haojia Shi who incidentally did the same thing last year
Final China scores
IMG_5154.jpeg
But USA beat China on points with 192 and hence USA is ranked 1 out of 108 countries, and China ranked 2
Also medal cutoffs are bronze≥16, silver≥22, gold≥29
USA final results:
IMG_5155.jpeg
Here are the Australian final results:
IMG_5156.jpeg
and Australia is ranked 38
 

tywebb

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honourable mention (HM) means a 7 in any question

i have met maths teachers who said they can't do any imo questions.

so a 7 in any question is a good achievement, especially for a year 10 student - even if they don't get a medal.

as you can see Amber Li, a year 10 student from Pymble Ladies College is one such contestant.

the amt wrote an article about her at https://www.amt.edu.au/news/meet-am...2024-international-mathematical-olympiad-team
 

tywebb

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there is also a youtube with Cloris Xu and Iris Xu who both got bronze medals

(audio only)
 

tywebb

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btw did you notice that australia beat both china AND the usa in question 4?

the total for australia in question 4 was 42, but usa and china both got 40.
 

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