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Riddle
A
worm is at the bottom of a forty foot hole. It can crawl upwards
at the rate of four feet in one day, but at night, it slips back
three feet. At this rate, how long will it take the worm to
crawl out of the hole?
Answer
37 days. At the
end of day one, the worm would be at the one foot mark. At the
end of the 35th day the worm would be at the 35 foot mark. On
the 36th day the worm travels from 35 feet to 39 feet but slips
back to 36 feet at the end of the 36th day. On the 37th day, the
worm travels up four feet from the 36th foot mark and is
consequently out of the hole.
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