# 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.

Note by Finn Hulse
6 years, 1 month ago

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## Comments

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Top Newest

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.

Staff - 6 years ago

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This probl em is truly mesmerizing.

- 6 years ago

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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.

- 6 years ago

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Thanks!

- 6 years ago

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

- 6 years ago

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

- 6 years ago

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Yeah, Ryan sums it up pretty well right here.

Staff - 6 years ago

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

- 6 years ago

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

- 6 years ago

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Cool.

- 6 years ago

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

- 2 years, 4 months ago

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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.

Staff - 6 years ago

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Wow a problem with over 3000 rating O.o

- 6 years ago

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

- 6 years ago

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Holy moly. \Tries to solve

- 6 years ago

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

- 6 years ago

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Personally thought this algebra problem was particularly difficult :P

- 6 years ago

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

- 6 years ago

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There you go , my friend!! :D

- 6 years ago

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

- 2 years, 3 months ago

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

- 6 years ago

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Hi Jose,

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

Staff - 6 years ago

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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...

- 6 years ago

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Knock yourself out:

You won't do it.

Noone's done it.

- 5 years, 5 months ago

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(-1)^π

Hardest problem...

- 4 years, 9 months ago

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