USAPhO Problems and Solutions

2026

USA

A1. 404 Vision Not Found

Problem Solution

A2. Straight on a Cone

Problem Solution

A3. Storm Chaser

Problem Solution

B1. Radiant Bubbles

Problem Solution

B2. Say Cheese... It's a Conic

Problem Solution

B3. The Trojan Cylinder

Problem Solution

2025

USA

A1. Shake It

Problem Solution

A2. Black Tides

Problem Solution

A3. Bitter and Magnetic

Problem Solution

B1. Scroll 'n' Roll

Problem Solution

B2. Where's the Kaboom?

Problem Solution

B3. Locked and Moded

Problem Solution

2024

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2023

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2022

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2021

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2020

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2019

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2018

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

Problem B3

Problem Solution

2017

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2016

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2015

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2014

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2013

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2012

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2011

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2010

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2009

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2008

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution

2007

USA

Problem A1

Problem Solution

Problem A2

Problem Solution

Problem A3

Problem Solution

Problem A4

Problem Solution

Problem B1

Problem Solution

Problem B2

Problem Solution