Older files in some versions of this archive may occasionally include solutions in the original host country’s language (e.g., Romanian, Bulgarian, or Serbian), though English is the official standard.
For any student or coach targeting the Junior Balkan Mathematical Olympiad, this archive is an essential resource . It offers the specific type of "middle-ground" challenge—harder than AMC 10 but more accessible than the IMO—that is necessary for developing advanced problem-solving skills. jbmo.rar
Euclidean geometry problems that require a deep knowledge of cyclic quadrilaterals, power of a point, and advanced triangle centers. Older files in some versions of this archive
Most archives include detailed proofs rather than just final answers, which is crucial for learning the "language" of mathematical proofs. power of a point