How to check the authenticity of a euro banknote by serial number? Detailed answer

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How to check the authenticity of a euro banknote by serial number? Detailed answer

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How to check the authenticity of a euro banknote by serial number?

The authenticity of a euro banknote can be verified by its serial number, which consists of a letter and eleven digits. It is necessary to replace the letter with its serial number in the Latin alphabet, add this number to the rest, then add the digits of the result until we get one digit. If this number is 8, then the bill is genuine. Another way to check is to add numbers like this, but without a letter. The result of one letter and number must correspond to a certain country, since the euro is printed in different countries. For example, for Germany it is X2.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How can you castle vertically in chess?

As you know, castling in chess consists in moving the king to the side of the rook of its color by two squares and then the rook to the square next to the king on the other side of the king, while the king and rook should not move before this. Dutch chess player Tim Crabbe came up with a problem in which white had to castle vertically to win. The pawn reaches e8 and becomes a rook, then the king moves to e3, and the rook to e2 - formally, all the rules are observed. After that, FIDE had to issue clarifications to the rules that castling can only be horizontal.

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