Each event has its own page on this website briefly explaining its format. Once the quiz is over, display the leaderboard. Or you may want to run a quiz show style competition at home.
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Web the moderator will read the questions, enforce time limits, supervise the clock, determine the correctness of responses, award and deduct points, and otherwise enforce the rules.
Web general rules there are many tournaments that take place during the course of the quiz olympiad.