tag:birbal.blog.co.uk,2009-11-06:/wisdomMokoFeed2009-11-06T13:57:08+01:00tag:birbal.blog.co.uk,2006-06-08:/2006/06/08/share_knowledge_about_math_and_science~862717/share knowledge about math and sciencebirba352006-06-08T13:01:56+02:002006-06-08T13:01:56+02:00 <p>pl tell how factorial zero = 1
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