List

USAPhO Problems and Solutions

The United States selection, run by AAPT since 1986. It opens with the F=ma exam, 25 multiple-choice questions in 75 minutes sat by thousands; around 400 top scorers advance to the USAPhO itself, six problems in three hours split into a Part A and a Part B; twenty students are then picked for the team. Every sitting AAPT publishes is here as a stage of its year: the F=ma exam, the Quarterfinal it ran for two years, the Semifinal that was later renamed the USAPhO, the additional USAPhO Plus, and the theoretical and lab tests sat at the training camp.

2026

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. 404 Vision Not Foundnot published
  • 2A2. Straight on a Conenot published
  • 3A3. Storm Chasernot published
  • 4B1. Radiant Bubblesnot published
  • 5B2. Say Cheese... It's a Conicnot published
  • 6B3. The Trojan Cylindernot published

2025

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Shake Itnot published
  • 2A2. Black Tidesnot published
  • 3A3. Bitter and Magneticnot published
  • 4B1. Scroll 'n' Rollnot published
  • 5B2. Where's the Kaboom?not published
  • 6B3. Locked and Modednot published

2024

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Ping Pongnot published
  • 2A2. Stellar Stabilitynot published
  • 3A3. Tilt Shiftnot published
  • 4B1. The Muon Shotnot published
  • 5B2. Solid Heatnot published
  • 6B3. Quality Questnot published

2023

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Circus Actnot published
  • 2A2. Time is a Flat Circlenot published
  • 3A3. The Motive Power of Icenot published
  • 4B1. Electric Roulettenot published
  • 5B2. Fast and Furiousnot published
  • 6B3. Starry Messengersnot published

2022

USA

F=ma
Exam A25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Exam B25 problemsProblemsSolutions
  • 26Problem 1not published
  • 27Problem 2not published
  • 28Problem 3not published
  • 29Problem 4not published
  • 30Problem 5not published
  • 31Problem 6not published
  • 32Problem 7not published
  • 33Problem 8not published
  • 34Problem 9not published
  • 35Problem 10not published
  • 36Problem 11not published
  • 37Problem 12not published
  • 38Problem 13not published
  • 39Problem 14not published
  • 40Problem 15not published
  • 41Problem 16not published
  • 42Problem 17not published
  • 43Problem 18not published
  • 44Problem 19not published
  • 45Problem 20not published
  • 46Problem 21not published
  • 47Problem 22not published
  • 48Problem 23not published
  • 49Problem 24not published
  • 50Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Moment of Claritynot published
  • 2A2. Death Metalnot published
  • 3A3. Rainbow Roadnot published
  • 4B1. Virial Realitynot published
  • 5B2. Broken Vasenot published
  • 6B3. Time Crystalnot published
Training Camp
Theoretical3 problemsProblemsSolutions
  • 1Take Fivenot published
  • 2Chain Reactionnot published
  • 3Lego Movienot published
Mystery Lab1 problemThe Future Circular ColliderProblemSolution
  • 4Mystery LabThe Future Circular ColliderProblemSolution

2021

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Toffee Puddingnot published
  • 2A2. Flashlightnot published
  • 3A3. Electroneeringnot published
  • 4B1. Disk Jockeynot published
  • 5B2. Hot Pocketnot published
  • 6B3. The Mad Hatternot published
USAPhO Plus
Problems3 problemsProblemsSolutions
  • 1The Jet Streamnot published
  • 2The Dark Forestnot published
  • 3Great Hallnot published

2020

USA

F=ma
Exam A25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Exam B25 problemsProblemsSolutions
  • 26Problem 1not published
  • 27Problem 2not published
  • 28Problem 3not published
  • 29Problem 4not published
  • 30Problem 5not published
  • 31Problem 6not published
  • 32Problem 7not published
  • 33Problem 8not published
  • 34Problem 9not published
  • 35Problem 10not published
  • 36Problem 11not published
  • 37Problem 12not published
  • 38Problem 13not published
  • 39Problem 14not published
  • 40Problem 15not published
  • 41Problem 16not published
  • 42Problem 17not published
  • 43Problem 18not published
  • 44Problem 19not published
  • 45Problem 20not published
  • 46Problem 21not published
  • 47Problem 22not published
  • 48Problem 23not published
  • 49Problem 24not published
  • 50Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Braking upnot published
  • 2A2. Swoosh!not published
  • 3A3. Spin Cyclenot published
  • 4B1. String Cheesenot published
  • 5B2. Mirror Mirror on the Wallnot published
  • 6B3. Real Expansionnot published

2019

USA

F=ma
Exam A25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Exam B25 problemsProblemsSolutions
  • 26Problem 1not published
  • 27Problem 2not published
  • 28Problem 3not published
  • 29Problem 4not published
  • 30Problem 5not published
  • 31Problem 6not published
  • 32Problem 7not published
  • 33Problem 8not published
  • 34Problem 9not published
  • 35Problem 10not published
  • 36Problem 11not published
  • 37Problem 12not published
  • 38Problem 13not published
  • 39Problem 14not published
  • 40Problem 15not published
  • 41Problem 16not published
  • 42Problem 17not published
  • 43Problem 18not published
  • 44Problem 19not published
  • 45Problem 20not published
  • 46Problem 21not published
  • 47Problem 22not published
  • 48Problem 23not published
  • 49Problem 24not published
  • 50Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1A1. Collision Coursenot published
  • 2A2. Green Revolutionnot published
  • 3A3. Electric Slidenot published
  • 4B1. Strain in the Membranenot published
  • 5B2. Stellar Black Boxnot published
  • 6B3. Pitfallnot published

2018

USA

F=ma
Exam A25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Exam B25 problemsProblemsSolutions
  • 26Problem 1not published
  • 27Problem 2not published
  • 28Problem 3not published
  • 29Problem 4not published
  • 30Problem 5not published
  • 31Problem 6not published
  • 32Problem 7not published
  • 33Problem 8not published
  • 34Problem 9not published
  • 35Problem 10not published
  • 36Problem 11not published
  • 37Problem 12not published
  • 38Problem 13not published
  • 39Problem 14not published
  • 40Problem 15not published
  • 41Problem 16not published
  • 42Problem 17not published
  • 43Problem 18not published
  • 44Problem 19not published
  • 45Problem 20not published
  • 46Problem 21not published
  • 47Problem 22not published
  • 48Problem 23not published
  • 49Problem 24not published
  • 50Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem B1not published
  • 5Problem B2not published
  • 6Problem B3not published

2017

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2016

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2015

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2014

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
USAPhO
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2013

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2012

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2011

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2010

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2009

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Quarterfinal
Problems4 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2008

USA

F=ma
Problems25 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
Quarterfinal
Problems4 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published

2007

USA

F=ma
Problems38 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published
  • 6Problem 6not published
  • 7Problem 7not published
  • 8Problem 8not published
  • 9Problem 9not published
  • 10Problem 10not published
  • 11Problem 11not published
  • 12Problem 12not published
  • 13Problem 13not published
  • 14Problem 14not published
  • 15Problem 15not published
  • 16Problem 16not published
  • 17Problem 17not published
  • 18Problem 18not published
  • 19Problem 19not published
  • 20Problem 20not published
  • 21Problem 21not published
  • 22Problem 22not published
  • 23Problem 23not published
  • 24Problem 24not published
  • 25Problem 25not published
  • 26Problem 26not published
  • 27Problem 27not published
  • 28Problem 28not published
  • 29Problem 29not published
  • 30Problem 30not published
  • 31Problem 31not published
  • 32Problem 32not published
  • 33Problem 33not published
  • 34Problem 34not published
  • 35Problem 35not published
  • 36Problem 36not published
  • 37Problem 37not published
  • 38Problem 38not published
Semifinal
Problems6 problemsProblemsSolutions
  • 1Problem A1not published
  • 2Problem A2not published
  • 3Problem A3not published
  • 4Problem A4not published
  • 5Problem B1not published
  • 6Problem B2not published