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11 replies to this topic

#1 moneybags962

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Posted 12 March 2008 - 02:14 AM

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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#2 yoda

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Posted 12 March 2008 - 04:59 AM

Spoiler for Frogs

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#3 EventHorizon

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Posted 12 March 2008 - 07:38 AM

Spoiler for tired froggy

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#4 brhan

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Posted 12 March 2008 - 10:11 AM

Spoiler for my solution

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#5 puzzled

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Posted 12 March 2008 - 11:28 AM

Spoiler for My Solution

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#6 bonanova

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Posted 12 March 2008 - 11:33 AM

Spoiler for looks like

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
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#7 brhan

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Posted 12 March 2008 - 11:58 AM

Spoiler for looks like


Ahhh ... I got it now.
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#8 moneybags962

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Posted 12 March 2008 - 08:40 PM

Spoiler for The CORRECT answer

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#9 jesusfreak1024

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Posted 12 March 2008 - 11:10 PM

Spoiler for The CORRECT answer

so you're saying (like puzzled said) that the frog needs to get above the lip to get out? if this is the case, then wouldn't the frog's hind legs be exactly 30 m from the bottom of the well, which is exactly 0 m from the top of the well? he should be able to get out then because his whole body is above the lip of the well because his hind legs are exactly 0 m from the top of the well. am i correct or did i miss something? :huh:
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#10 moneybags962

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Posted 12 March 2008 - 11:58 PM

my bad bonanova did NOT have the correct answer
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