2013 exam and solutions, annotated with number of top 72 people answering them correctly.
2012 exam and solutions, annotated with the number of people answering them correctly.
2011 exam and solutions, annotated with number of top 46 people answering them correctly.
2010 exam and solutions, annotated with number of top 54 people answering them correctly.
2009 exam and solutions, annotated with number of people answering them correctly.
2008 exam and solutions, annotated with number of people answering them correctly.
2004 exam and solutions.(Two problems talk about shaded regions which are not shaded on the screen. In number 32, there is a sort of cross-shaped figure which should be shaded, while on number 40, the small interior triangle should be shaded.)
2000 exam and solutions.