Our Competitions

We run two annual competitions analogous to the USABO Open and Semifinal exams, and registration for our Fall p+q=1 Opens Exam is open now.

Fall p+q=1 Opens Exam

Registration open now!

A 50-question multiple-choice exam, similar in difficulty and structure to the USABO Open Exam. The testing window runs from Sunday, November 9 at 12 AM PST to Saturday, November 15 at 11:59 PM PST. $100 in prizes and certificates for the top performers!

50 MCQs

USABO Open format

Nov 9–15

Testing window (PST)

Register Now Read the Rules

Rules & Information

Open to high school students globally, our exams will take place online. They will be available to take all day. Explore the complete guidelines in our official rules document!

Sign Up for Updates Read the Rules

Competition Rounds

Our two-round system is designed to challenge and prepare students for national-level biology competitions.

\(p+q = 1\)

This is the first round of our competition, mirroring the difficulty of the USABO Open exam. The test consists of 50 multiple-choice questions to be completed in 50 minutes, with 5 choices per question.

\((p+q)^2=1\)

This second round corresponds to the USABO Semifinals exam. The test consists of 100 questions in 120 minutes, featuring 65 multiple-choice and 35 multiple-true/false questions.