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• 2005 USAMO Problems/Problem 3
  ...through A, and so sets up a ghost point for <math>Q</math>, which works. ~cocohearts
  6 KB (1,117 words) - 00:17, 11 October 2021
• 2008 USAMO Problems/Problem 2
  ~cocohearts
  20 KB (3,565 words) - 10:54, 1 May 2024
• 2011 USAJMO Problems/Problem 3
  ~ cocohearts
  15 KB (2,593 words) - 12:37, 29 January 2021
• 2017 USAJMO Problems/Problem 3
  ~cocohearts
  10 KB (1,829 words) - 02:13, 16 March 2022
• Mathcounts Week/Countdown Round
  1 cocohearts
  11 KB (1,044 words) - 19:27, 21 September 2024