2 ms·
You might try something like https://www.mathcircles.org/ https://www.mathcircles.org/ (They weren't around when I was a kid, so I can't say from experience.)
by abecedarius 10y ago
You might try something like https://www.mathcircles.org/ https://www.mathcircles.org/
(They weren't around when I was a kid, so I can't say from experience.)