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0 / 60 seg.
John 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 John fell asleep almost immediately, how many hours of sleep did he get before the alarm woke him?
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Clue
"ELEMENTARY, MY DEAR WATSON. SOMEONE HAS STOLEN OUR TENT."
IN 3 1/2 HOURS THE ALARM CLOCK HAS BECOME 14 MINUTES SLOW. AT NOON THE ALARM CLOCK WILL FALL BEHIND APPROXIMENTLY AN ADDITIONAL MINUTE. ITS HANDS WILL SHOW NOON IN 15 MINUTES
TWO HOURS. WIND-UP CLOCKS CAN'T BE SET MORE THAN 12 HOURS IN ADVANCE
YOU WILL ONLY GET 1 HOUR OF SLEEP SINCE WIND-UP ALARM CLOCKS DO NOT DISCRIMINATE BETWEEN AM AND PM. SO WHEN YOU SET THE ALARM TO SOUND AT NINE O'CLOCK, THE ALARM WILL GO OFF AT BOTH 9:00 AM AND 9:00 PM
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