The Unicus Global Mathematics Olympiad (UGMO) is an international online competition for students from kindergarten to 10th grade. Participants get three mock tests to practice before the final exam, which can be taken up to three times. The exam includes multiple-choice questions.
UGMO is held in the winter, and the test topics match the student's current class syllabus. You can register individually online. Free sample papers are available for practice. Access the UGMO free sample paper.