HMMT November 2017 U9
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- Answer
A malfunctioning digital clock shows the time ; however, the correct time is . There are two buttons on the clock, one of which increases the time displayed by 9 minutes, and another which decreases the time by 20 minutes. What is the minimum number of button presses necessary to correctly set the clock to the correct time?
Dataset text NuminaMath olympiads. Quoted with source.
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