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Error detection and correction
Product code check digits
Product code check digits programming exercises
Scratch
Scratch challenges have not been updated to our new plugging it in system. However, you can still access the old content using the links below.
Number
Name
Challenge Level
1.1
12 digit product codes: Weighted sum of digits (entered one at a time)
Growing experience
1.2
13 digit product codes: Weighted sum of digits (entered one at a time)
Growing experience
2.1
12 digit product codes: Check if total is a multiple of 10 (entered one at a time)
Growing experience
2.2
13 digit product codes: Check if total is a multiple of 10 (entered one at a time)
Growing experience
3.1
12 digit product codes: Check if total is a multiple of 10 (one line of input)
Growing experience
3.2
13 digit product codes: Check if total is a multiple of 10 (one line of input)
Growing experience
4.1
12 and 13 digit product codes: Check for a valid product code (any length)
Ready to expand
5.1
12 digit product codes: Calculate the last digit (entered one digit at a time)
Ready to expand
5.2
13 digit product codes: Calculate the last digit (entered one digit at a time)
Ready to expand
6.1
12 digit product codes: Calculate the last digit (one line of input)
Ready to expand
6.2
13 digit product codes: Calculate the last digit (one line of input)
Ready to expand
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