This problem involved minimizing a specific expression given the constraint
A significant majority (24 out of 28) of gold and silver medalists achieved a perfect score on Problem 1, confirming its low difficulty. Comentarii JBMO 2015
Problem 1 was criticized for being perhaps too simple for an international olympiad, acting more as a "points booster" than a differentiator for top talent. This problem involved minimizing a specific expression given
The competition consisted of four problems covering algebra, number theory, geometry, and combinatorics. For further analysis, you can explore the full
For further analysis, you can explore the full JBMO 2015 solutions and commentaries provided by the Viitori Olimpici platform. JBMO 2015 Problems and Solutions | PDF | Mathematics
A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles,
. Notes indicate that many participants were able to solve this using analytical or vector methods.