PRIME, the Program for Inducing Mathematical Excellence, was a two-month training program I ran in my high school in 2016 and 2017. The main goal was to write good, freely-available material for training for Philippine math contests.
The goal of PRIME 2017 is to make a series of handouts and problem sets for a motivated high school student to work through on their own to prepare for the PMO. The homework refers to problems from PRIME 2016, located below. Solutions for most problems in the homework are also in PRIME 2016. You can view their LaTeX source files here.
The goal of PRIME 2016 was to sort all available PMO problems before 2016 into categories, and writing solutions for each of them. Much thanks to the students of PRIME 2017, who helped write solutions. You can view their LaTeX source files here.