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Generalization of Finch Cheney’s 5 Card Trick

apr 8 10 at 14:54 Jonah Ostroff 1,363●1●6●16

 
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Weird relationship: Exists x(not 1), x^3=1 MOD M if and only if 3|Phi(M) [closed]

jan 16 10 at 17:34 Alison Miller 1,874●10●16

 
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Diophantine: Ax+B=Cy [closed]

mar 15 10 at 19:40 Dan 61●1●6