Below are past exams with the answer for each question. Have fun!

Contest Questions Answers
2018 Contest 2018 Answers

  • Question 16 was dropped
2016 Contest 2016 Answers

  • Questions 14 and 26 were dropped
2015 Contest 2015 Answers
2014 Contest 2014 Answers
2013 Contest 2013 Answers
2011 Contest 2011 Answers

  • Question 31 was dropped
2010 Contest 2010 Answers
2009 Contest 2009 Contest
2008 Contest 2008 Contest
2007 Contest 2007 Contest