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USABO HubPlano East Senior High School

Practice

Practice questions

Every question here is Club-created USABO-style practice: original questions whose answers are checked against published sources, with every calculation recomputed. Spot an error? Use Report a problem under the question. For real past exams, use the official USABO materials.

Choose a practice mode

  • Quick practice

    10 questions from across the bank. Good as a daily warm-up or a first diagnostic.

    Start

  • Challenge

    10 advanced and olympiad-style questions.

    Start

  • Weak-area practice

    Built from the learning objectives you have missed. Answer some questions first.

    Start

  • Mixed practice

    15 questions from the topics you pick, interleaved. Switching topics is harder, and it helps you remember more.

    Pick two or more topics. Leave all unchecked to mix everything.

  • Mock exam

    A full timed exam built from the question bank. Unofficial USABO-style practice.

    Go to mocks

Topic practice

20 questions, or all available if the topic has fewer. Difficulty adjusts as you go.