The USABO Open past paper Worked Solutions for years 2005-2014.
Since the USABO past papers don’t come with solutions, we’ve written “USABO Worked Solutions” to help you in your studies. It’s the only such set of worked solutions made to help you solve past USABO questions. It contains detailed explanations for every question from 2005 to 2014 Open exams as well as comprehensive extra reading material.
*Note that PDF files are nonrefundable.
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