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From 1972 until 1995 each competition had a single paper of 5 questions (to be solved in 3 1/2 hours). Thereafter each competition has had two papers each with 3 questions (originally 3 hours for each paper, 4¨ö hours from 2002).
http://www.unl.edu/amc/e-exams/e8-usamo/usamo.shtml |