2011 AIME II
2011 AIME II problems and solutions. The test was held on March 30, 2011. The first link contains the full set of test problems. The rest contain each individual problem and its solution. Not all solutions may be correct, but are likely to be, unless otherwise stated.
Note: Somebody who knows how, please convert all solution pages to the template that was used in the 2011 AIME I section. It seems to be very useful for navigation.