Almost an IMO Problem | IMO Shortlist 2019 N2
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9:17
Do not Solve for x
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14:27
Is 8^n+47 never a prime? Why? | JBMO Shortlist
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8:52
How Geometry Solved the Most Difficult Number Theory Problem at the IMO 2001 #SoME3
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19:27
You, Me and The Legend of Question 6
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12:20
An equation Diophantus never considered.
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16:00
International Mathematical Olympiad 1994 Problem 4
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11:26
Solving the hardest question of a British Mathematical Olympiad
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12:12