From a 9th Grader in Romania
This is an Olympiad practice problem for young students training for the mathematics Olympiad in Romania. Thanks Vlad for sending me this one.

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A fun proof for an integer

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Romanian Mathematics Olympiad

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Determine a and n

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Compute the largest number

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Germany | Can You Solve This Math Olympiad Problem?

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Mom Called Emergency Meeting About My Pathetic Career—Then Sterling Capital Called...| Peony Revenge

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a+b+c+d+e = abcde

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A Canadian Problem

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Stockfish, But It Loses 50 ELO Every Move

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Find All Prime Pairs (p. q) for Positive Integer n.

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Austrian Olympiad System of Equations

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Stanislav Krapivnik: Russlands Wut kocht über – Steht ein EU-Russland-Krieg bevor?

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Pell's Equation Basics
![Simon Thought He Ruined The Trick... Then The Real Magic Began | Darrell Moten | AGT 2026 [4K]](https://i.ytimg.com/vi/FLYU7twxikA/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCa2rmKPzUroGgb4PWaVnvRFFdYVg)
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Simon Thought He Ruined The Trick... Then The Real Magic Began | Darrell Moten | AGT 2026 [4K]

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Is this limit actually solvable? Tricky calculus 1 limit. Reddit r/askmath

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Where Does Light Get Its Speed From? (The Physics Secret)

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Find the number of real solutions

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Chosen One!! The Assignment Over Your Life is Not for the Weak 💯 You've Done the Impossible!!

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how Richard Feynman would integrate 1/(1+x^2)^2

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