Russian portal with mathematics textbooks, problem collections, and reference materials.
A collection of geometry competition problems from Russian mathematical olympiads.
Archive of problems and solutions from Russian mathematics olympiad competitions.
Russian-language archive of mathematics theory explanations and solved problems.
Collection of problems from the Möbius math contest for students.
Saint Petersburg mathematics center providing lecture notes and teaching materials on mathematical methods and theory.
Russian youth mathematics school site offering problems and materials; status and content unverified.
Archive of geometry olympiad problems for secondary school students.
Online archive of Moscow Mathematics Olympiad past problems.