UPC codes practice problems (second quiz)
1. UPC detective: find the missing number in each of these UPC codes:
| Code |
missing digit |
|
|
?-78787-03104-3 |
|
|
|
0-?0735-00458-1 |
|
|
|
0-7?787-04104-2 |
|
|
|
0-41?40-56400-3 |
|
|
|
0-875?7-79000-7 |
|
|
|
0-4154?-33111-7 |
|
|
|
0-51515-?2385-0 |
|
|
|
0-41540-5?401-0 |
|
|
|
0-30643-54?23-7 |
|
|
|
0-21200-665?2-6 |
|
|
|
0-71641-8000?-5 |
|
|
|
0-41540-3351?-6 |
|
|
2. What are check digits good for? Why do they bother to put check digits on UPC codes and things like that?
