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Old 2006-10-19, 17:14   #4
Bronze Medalist
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Jan 2004

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Thumbs up Arithmetic progression.

Sorry to correct you but Retina is right, tho' you are also right tho' your method is not orthodox.
This problem was solved in a jiffy by Gauss, when he was 6 yrs. old , one of the three greatest mathematicians, who ever lived,[ Archimedes, Newton and Gauss]
I'm glad you mentioned it as it has refreshed my aging memory.


Last fiddled with by mfgoode on 2006-10-19 at 17:16 Reason: Add on
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