The Frog

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The Frog

Postby Don L. Sargent » Mon Feb 21, 2011 5:30 am UTC



A frog is at the bottom of a 30 meter well. Each day he summons enough energy for one 3 meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Note: Assume after the first leap that his hind legs are exactly three meters up the well. His hind legs must clear the well for him to escape.
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Re: The Frog

Postby teelo » Mon Feb 21, 2011 8:39 am UTC

Spoiler:
28 days?
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Re: The Frog

Postby jestingrabbit » Mon Feb 21, 2011 2:54 pm UTC

This is also a repeat.

viewtopic.php?f=3&t=65052&p=2351321

lock'd
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