HMMT 2002 U27
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- Answer
Consider the two hands of an analog clock, each of which moves with constant angular velocity. Certain positions of these hands are possible (e.g. the hour hand halfway between the 5 and 6 and the minute hand exactly at the 6 ), while others are impossible (e.g. the hour hand exactly at the 5 and the minute hand exactly at the 6 ). How many different positions are there that would remain possible if the hour and minute hands were switched?
Dataset text NuminaMath olympiads. Quoted with source.
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