Search results

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...

Turns out there was 1 perfect scorer from China, Haojia Shi who incidentally did the same thing last year Final China scores 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...

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:

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! but in all 9 pages there are only 2 with 35 so far - which means...

incomplete scoreboard is at https://local.imo-official.org/Mboards/Scoreboard.aspx?page=1&dimX=4&dimY=3&time=1000 results so far for australia: probably finalised tomorrow lots of 7s there especially for AUS3 so expect at least 1 medal medal cutoffs not finalised either

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...

2024 solutions: https://static1.squarespace.com/static/6466334ad7b8bd6423671df6/t/6697e748ea84cc7893e4aab8/1721231178032/IMO+2024+-+Paper+1+Solutions.pdf

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.

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

1st 3 questions for 2024 imo: australian contestants: only half done so far so 3 more questions coming later and should be very soon

so how about the biggest proof ever - that every finite simple group is cyclic of prime order, alternating, Lie type or sporadic first-generation classification 1955-2004 in over 500 papers and 15000 pages - so spread out that some experts involved in it have said no-one has read them all - so...

It's quite a recent proof, made in 2020 by this dude ZiJian Diao who put it in ZiJian Diao (2020) An Elementary Proof of the Irrationality of e, The American Mathematical Monthly, 127:1, page 84

did your teacher teach you this proof by contradiction for irrationality of e?

Well you can't make good wine from bad berries. If the only Australians who are breeding are the neanderbogans and those from better stock refuse to breed, what results is an anti-Darwinian devolution.

Dumbing down in schools is so bad that in 11 years Australia will have no physics students left Even worse for girls - that's 8 years.

Reflections magazine had them 1975-1980 but they are not online As I said before I've got them somewhere but I had trouble finding them. I'll look again later. The 1981-1989 is at http://www.mediafire.com/file/bsb129a66br9o94/1981-1989.zip

Just a technical matter, but the last step in Killara solutions should replace ± with + I thought I had solutions to the 1979 HSC but seem to have lost them. I will try to find later, but they should be similar to the Killara solutions.

Killara ext 1 2020 Q14c

1979 4u HSC Q3

There are 2 versions of the 2023 ext. 2 cssa, one with Q11d uncorrected and the other has it corrected. If you happen to get the uncorrected cssa, I should point out that there is an error in the original paper. The one I used was the corrected version Q11d: You will see "at rest" is crossed...