Haven't time right now, but check this out:
http://mathworld.wolfram.com/ISBN.html
--
Regards,
RD
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"Don_Quixote60" wrote in message
...
Afraid it's not that easy.
"JE McGimpsey" wrote:
One way:
A1: 978-3456789012
A2: =RIGHT(A1,10)
In article ,
Don_Quixote60 wrote:
I HAVE ALREADY FOUND A FORMULA TO CHANGE 10 DIGIT ISBN NUMBERS TO 13
DIGIT
BUT I NEED A FORMULA TO CHANGE 13 DIGIT TO 10