IMO 2015!

The questions from IMO 2015 have been posted. Try your hand and see which questions you can do! I strongly encourage you to do Question 2, Question 4 and Question 5.

The participants will be out enjoying the various excursions, while their team leaders are fighting for points. Which country do you think will be top?

Here are some of last years returning Gold Medalists to this years IMO!

Australia:Alexander Gunning (bronze 2012, gold 2013, gold 2014)

Canada: Alex Song (bronze 2010, gold 2011-2014) Kevin Sun (bronze 2013, gold 2014)

China: Jiyang Gao (gold 2014)

Hungary: Zsombor Feher (bronze 2013, gold 2014)

Kazakhstan: Akhan Ismailov (gold 2014)

North Korea: Songyong Choe (silver 2013, gold 2014)

Romania: Stefan Spataru (bronze 2012, silver 2013, gold 2014)

Singapore: Yijia Liu (silver 2013, gold 2014) Sheldon Kieren Tan (gold 2014) Siah Yong Tan (gold 2014)

United States: Allen Liu (gold 2014) Yang Liu (gold 2014)

Vietnam: The Hoan Nguyen (gold 2014)

A special callout toZhui Qun (Alex) Song from Canada! If he continues his streak, He will be on the top of the IMO Hall of Fame with 6 medals in the IMO(5 Gold)! (which he has done and taken up #1 on the Hall of Fame!)

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Markdown	Appears as
`italics` or `_italics_`	italics
`bold` or `__bold__`	bold
- bulleted - list	bulleted list
1. numbered 2. list	numbered list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1 paragraph 2	paragraph 1 paragraph 2
`[example link](https://brilliant.org)`	example link
`> This is a quote`	This is a quote
# I indented these lines # 4 spaces, and now they show # up as a code block. print "hello world"	# I indented these lines # 4 spaces, and now they show # up as a code block. print "hello world"

Math	Appears as
Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

@Calvin Lin What are your views on this years IMO and the difficulty and beauty of its Questions?

(After all you have been there twice!)

Sualeh Asif - 5 years, 11 months ago

@Calvin Lin

You have taken the IMO, so give your own views

Syed Hamza Khalid - 2 years, 8 months ago

Congrats to team USA for winning the IMO (the first time in 19 years, from what I can see), ahead of all the other powerhouses! Also big congratulations to the king of the IMO, Alex Song, who finished his illustrious IMO career with a perfect score, and topping the IMO hall of fame!

Elliott Macneil - 5 years, 11 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$