Comentarii Jbmo 2015 -

. 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

. 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. including classic Euclidean geometry

Problem 3 (Geometry) was noted for its "attackability" through multiple different methods, including classic Euclidean geometry, vectors, and coordinate geometry. and coordinate geometry.