Hardest Problems on Brilliant

Could you guys post links to the hardest problem you have ever encountered on Brilliant? That way users who are hunting for difficult problems can solve them and boost their rating. Please do not post answers.

#Math #ProblemSolving #Awesome #Difficult #ExtremelyChallenging

Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

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`bold` or `__bold__`	bold
- bulleted - list	bulleted list
1. numbered 2. list	numbered list
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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

Hi Finn,

I thought this problem was breathtakingly beautiful in it's simplicity.

I'll ask around the office and see if we can dig up a historically absurdly difficult problem for you to look at.

Peter Taylor Staff - 7 years, 4 months ago

This probl em is truly mesmerizing.

Soham Dibyachintan - 7 years, 4 months ago

This is really a nice problem.I couldn't take up the courage 2 write d correct answer as i was nt sure 4 it.

Namita Lohani - 7 years, 4 months ago

Thanks!

Finn Hulse - 7 years, 4 months ago

Yeah that one was crazy hard... I mean seriously! That took me forever! ;)

Finn Hulse - 7 years, 4 months ago

I Love this problem, took me so long to get the courage to type in the answer

Yan Yau Cheng - 7 years, 4 months ago

Yeah, Ryan sums it up pretty well right here.

Peter Taylor Staff - 7 years, 4 months ago

This....is.....HILARIOUS!!! :D

Pranav Arora - 7 years, 4 months ago

Try this one out: https://brilliant.org/community-problem/an-interesting-problem-264/?group=iiMQMGYWAfX2

Finn Hulse - 7 years, 4 months ago

Cool.

Soham Dibyachintan - 7 years, 4 months ago

Hi,this problem is deleted so could anyone tell me what was it?

Sumukh Bansal - 3 years, 7 months ago

Exactly, what was it about?

Mahdi Raza - 1 year ago

We are pretty sure this is the hardest algebra problem on Brilliant. Could be wrong though, ratings are a dynamic thing.

Edit: I bungled the link the first time it should work now.

Peter Taylor Staff - 7 years, 4 months ago

Wow a problem with over 3000 rating O.o

William Cui - 7 years, 4 months ago

That's right, I kneel down when I see this problem...

敬全钟 - 7 years, 4 months ago

Holy moly. \Tries to solve

Ahaan Rungta - 7 years, 4 months ago

Maybe hard. https://brilliant.org/community-problem/strokes/?group=HdtDpoEPM9Zd&ref_id=88876

Lee Care Gene - 7 years, 4 months ago

Personally thought this algebra problem was particularly difficult :P

Katie Gardner - 7 years, 4 months ago

Also, just for fun, you can post a ridiculously easy problem.

Finn Hulse - 7 years, 4 months ago

There you go , my friend!! :D

Panchu Patel - 7 years, 4 months ago

ridiculuously easy..... x^2 >= xy >= y^2 show that 9(x^2)+6(xy)+(y^2) >= 0

Rn K - 3 years, 7 months ago

Can someone post the hardest Combinatorics problem they've come across?

José Marín Guzmán - 7 years, 4 months ago

Hi Jose,

I don't think this is the hardest combinatorics problem on Brilliant, but this one is relatively recent and rated quite high.

Peter Taylor Staff - 7 years, 4 months ago

There was a number theory before the site was revamped, one that dealt with remainders modulus 19 and included three variables (unknowns, k,a,b based on certain restrictions though). The only answer I saw for that question had an incomplete proof, so that should be sufficient evidence for its difficulty. If anybody here is able to find it...

Jared Low - 7 years, 4 months ago

Knock yourself out:

You won't do it.

Noone's done it.

You might do it.

John M. - 6 years, 9 months ago

(-1)^π

Hardest problem...

Beyond Imagination - 6 years, 1 month 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}`	$\boxed{123}$