WoPhO Problems and Solutions


Files collected from WoPhO Website and the deepest parts of the Internet.
The last three questions from 2011 and 2012 are from the final round of WoPhO, all the other problems are from the selection rounds. In 2013, the last year of the competition, only the selection round occurred.

Other resources: APhO, EuPhO, IPhO, NBPhO, RMPh