The competition consisted of four problems covering algebra, number theory, geometry, and combinatorics.
A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles, Comentarii JBMO 2015
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 The competition consisted of four problems covering algebra,
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
. Commentary suggests this was a very accessible problem, possibly even at a 5th or 6th-grade level, which resulted in a high number of maximum scores.