The USABO Open Exam is a 50-minute, multiple choice exam focusing on theoretical knowledge. The 2003 to2018 Open Exams with answer keys may be found below. These questions are helpful tools in understandingthe breadth and depth of USABO content and may be used as a study guide. The exams have evolved overthe years to include more thought provoking, complex questions In addition, the 2003 to 2018 Semifinal Examswith answer keys may be found below. The exams are proprietary and the property of the Center forExcellence in Education and may not be distributed or stored electronically without the permission of the Centerfor Excellence in Education.