Less serious side effects may include: 1  mild headache; 2  mild dizziness; 3  sleep problems (insomnia); 4  back pain; 5  nausea, diarrhea, stomach pain; 6  cold symptoms such as stuffy nose, sneezing, sore throat; or. 7  mild skin rash.
The International Standard Book Number (ISBN) is a unique numeric commercial book identifier. An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN.
If the check digit should be the letter X, then it takes the value of 10. When the division by eleven is performed, the remainder will be zero for a valid ISBN. Please note that the validation being performed here is to check the correctness of the check digit for the rest of the numbers and their place in the number.