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How many hours of sleep did he get before the alarm woke him?

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Jayant was very tired after a long day of work.
He went to bed at 10 p.m.,
wound his alarm clock and set it for noon the next day.
Since Jayant fell asleep almost immediately,
How many hours of sleep did he get before the alarm woke him?

posted Jan 3, 2019 by Chahat Sharma

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