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**robin****Member**- Registered: 2005-09-23
- Posts: 3

Hi,

You have probably all seen or read about Fermat receiving a letter asking if 100895598169 is prime and quickly replying that it was a factor of 112303 and 898423.

Anyway, I was trying to find out how he worked it out. Knowing the answers gives a huge help in finding a method, but don't think he did it the same way.

100895598169 X 8 = 807164785352

Sqrt of 807164785352 = 898423

100895598169 / 898423 = 112303

Can anyone come up with other methods ?

Robin

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**kweyers59@aol.com****Member**- Registered: 2005-09-25
- Posts: 2

Help... a problem in combinatorics..

stadndard 52 card deck - 5 cards being dealt.. what is the probability to have at least 3 non-paired cards under 9??

Santa in Florida, USA kweyers59@aol.com

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