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0 / 60 seg.
A doctor gives you 5 pills and instructs you to take each at intervals of half an hour. How long will the pills last?
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Clue
THE JAR WILL BE HALF FULL IN 59 MINUTES. A MINUTE LATER, IT WILL DOUBLE AND WILL FILL THE JAR
80 MINUTES = 1 HOUR 20 MINUTES. SAME DISTANCE AT THE SAME SPEED TAKES THE SAME TIME
60 MINUTES. MANY OF YOU PROBABLY THINK THAT THEY SHOULD MULTIPLY 3 PILLS BY 30 MINUTES TO GIVE 90 MINUTES. BUT THINK OF HOW YOU TAKE THE PILLS. YOU TAKE THE FIRST PILL, AND IN A HALF-HOUR YOU TAKE THE SECOND PILL, AND THEN IN THE NEXT HALF-HOUR YOU TAKE THE THIRD PILL. SO THE NUMBER OF MINUTES THAT PASS FROM THE FIRST TO THE THIRD PILL IS 60 MINUTES
THE PILLS WILL LAST FOR 2 HOURS. IF YOU TAKE THE FIRST PILL AT 10:00AM, THEN YOU WILL TAKE THE 5TH PILL AT 12 NOON (10, 10:30, 11, 11:30, 12)
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