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The Euro Information Website Forum • View topic - banknote checksums

 

banknote checksums

Euro banknotes
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banknote checksums

Postby john1025 » 23 Mar 2013, 21:46

I have a €20 note with serial number U02401890701. When I add up the digits I get a sum of 32 which is 3+2 = checksum for France. OK. The national code is "U" for France and it has a printing code of 'E" which is also France.

I have a €5 note with serial number X00025041809. When I add up the digits I get 29 which gives 2 + 9 = 11. With double digits supposed to use only first digit but that is 1 which is a "2". ???? The "X" is the national code for germany and the printing code is "P" which is also Germany. My question is why didn't I come up with a checksum of 2?
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Re: banknote checksums

Postby So Many Euros » 09 Apr 2013, 00:48

X00025041809 => 29 => 2 + 9 = 11 => 1 +1 = 2 => 2 = checksum for Germany

Checksum is digital root which is calculated as long as only a single digit remains.

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