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# What are the hardest problems that have been featured on brilliant.org?

Is there an archive somewhere? If not, can you guys post which ones you remember that were the hardest? I want some practice.

Note by Michael Tong
3 years, 10 months ago

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brb, building search and recommendation features :)

Staff - 3 years, 10 months ago

I remember one that was in the 3000's a while ago... But I can't find it now :(

- 3 years, 10 months ago

I remember one from maybe 4 months ago where it had some stuff about a polynomial and it asked to find the sum of $$f(10)$$ over all such polynomials and the answer was $$360$$ or something. I remember seeing only like 25 ppl solved it so I was like woww lol

- 3 years, 10 months ago

Yeah The rating was somewhere near 3200 .

- 3 years, 10 months ago

Paging @Calvin Lin :P

- 3 years, 10 months ago

This one has a rating of 2977 and it came out recently. Click here to see it

- 3 years, 10 months ago