Re: April 2007 IBM Ponder This Challenge
 

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with most of the hard math done by the poster jason1990.

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This is not right. f97tosc was the first to post a derivation of (7 - 3\sqrt{5})/2. That was hard math and is arguably the heart of the matter. He/she(?) also contributed in other significant ways. This thread has over 1000 views and is currently the fifth listed result in a Google search for "ibm ponder this," so we should not unfairly minimize anyone's contributions.

Re: April 2007 IBM Ponder This Challenge
 

Sorry about that f97tosc.

PairTheBoard

Re: April 2007 IBM Ponder This Challenge
 

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We can reformulate the problem to the question "what is the probability that the frog will not eventually land on 0, assuming it starts from minus infinity?".

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Hi - sorry for my dimwittedness: can you please explain more in detail (for the slow dude) how one gets to this from the original?
Thanks!