Old exams with solutions

2011-12-16: exam, solution.
2010-12-13: exam, solution.
2010-01-14: exam, solution.
2009-10-09: exam, solution.
2009-08-20: exam, solution.
2009-01-09: exam, solution.
2008-10-08: exam, solution.
2008-01-11: exam, solution.
2007-10-17: exam, solution.