Kalva (Popularity: )

Complete set of all International Mathematical Olympiad problems with solutions. Also includes problems sets from ...
Category: Science\Math\Recreations\Competitions

Putnam Exam Information (Popularity: )

Results from the Putnam competition, old exams, and problem archives. Includes problem of the day, ...
Category: Science\Math\Recreations\Competitions

Exploring and Modern Ruins (Popularity: )

Karl Xydexx Jorgensen's photographs of abandoned places including Bannerman's Castle, the town of Centralia, Pennsylvania, ...
Category: Science\Social Sciences\Archaeology\Periods and Cultures

Mathematics Problem Solving (Popularity: )

Old sample problems from Putnam training sessions, by Monica Nevens (University of Ottawa).
Category: Science\Math\Recreations\Competitions