Jbmo 2015: Comentarii

. Notes indicate that many participants were able to solve this using analytical or vector methods.

Participants had to find prime numbers and an integer satisfying the equation Comentarii JBMO 2015

This problem involved minimizing a specific expression given the constraint Problem 1 was criticized for being perhaps too

Problem 3 (Geometry) was noted for its "attackability" through multiple different methods, including classic Euclidean geometry, vectors, and coordinate geometry. It required determining the minimum number of marked

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.

A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles,

A game-theory problem on a board involving L-shapes. It required determining the minimum number of marked squares needed to ensure a certain outcome. Key Commentary Insights