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Dear Prof. Sean Burbidge,
I am a teacher of Mathematics Department of
Calcutta University, Calcutta, India. I like to know the answer of the questions
from you.
In every credit card the code for identification
number consists of different blocks. Which block stands for what?
How to calculate check digit?
What kind of errors would be detected by this check
digit?
Would you please give some time to reply my
questions?
Thanking you.
Yours Sincerely,
M.K.Sen
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