: The AoPS Community frequently discusses and archives problems from national olympiads worldwide, including Cuba. Competition Format and Level
The national competition typically follows a format similar to the IMO: cuban mathematical olympiads pdf
: This is the most comprehensive resource available. It compiles problems from 2001 to 2016 (excluding 2002) and provides "elegant" solutions. You can find a preview of this content on the AwesomeMath Website or a partial Look Inside PDF . : The AoPS Community frequently discusses and archives