Cuban Mathematical Olympiads Pdf !full! Online

To illustrate the quality, here is a classic problem translated from a 2015 PDF:

The national competition typically follows a format similar to the IMO: cuban mathematical olympiads pdf

First, I should outline the structure of the report. A typical report might have an introduction, then sections on history and evolution of Cuban MOs, problem structure and content, notable problems or achievements, and some analysis or impact on mathematics education in Cuba. Maybe also a section on Cuban participation in international competitions like the IMO. But I need to make sure the info is accurate. Let me check some sources or details if possible. Wait, since I can't browse the internet, I have to rely on my existing knowledge. To illustrate the quality, here is a classic

Use modular arithmetic mod 5. Test residues. But I need to make sure the info is accurate