1. Validating an ISBN-10 Code
LibrarianBackground
A librarian is cataloging a batch of older books and wants to verify if a handwritten ISBN-10 code is correct before entering it into the database.
Problem
The ISBN-10 code '0306406152' needs validation to ensure the check digit matches the payload.
How to use
Set the mode to 'Validate', select the 'ISBN-10' weighting scheme, and enter '0306406152' into the number field.
Mode: validate, Scheme: isbn-10, Number: 0306406152Outcome
The tool confirms that the number is valid, verifying that the check digit '2' matches the Mod-11 calculation.