a. The country digit is missing from the Euro banknote with serial number 3552976804...

a. The country digit is missing from the Euro banknote with serial number 35529768044. Use Table 1.6 to determine the possible countries of origin.

b. The check digit is missing for the Euro banknote with alphanumeric serial number T1104873647. Use Table 1.6 and determine the check digit required to make the sum of all 12 digits divisible by 9.

Table 1.6: