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| Re: Math Geniuses Attempt Guiness NYC Subway Riding Record (736063) | |||
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Re: Math Geniuses Attempt Guiness NYC Subway Riding Record |
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Posted by JohnL on Thu Jan 22 20:29:45 2009, in response to Re: Math Geniuses Attempt Guiness NYC Subway Riding Record, posted by SelkirkTMO on Thu Jan 22 20:17:49 2009. Especially when they don’t seem to be particularly bright:"We've been studying for six months - it's not that complicated," said Ferrisi, a quantitative analyst from Astoria. "It's only 468 factorial," he added - without a hint of sarcasm - referring to the number of subway stations in the system. The number of worthwhile solutions is considerably less than 468! since stations in a row effectively count as one in the combinatorics (and I’m sure that five minutes would show other similar optimizations). And 468! isn’t trillions: 450! is approximately 2E1000. |
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