Iris smiled as professor Shackleton said this and began to think about how it could be done. it was in her book somewhere... She flicked through the book until she got to the right page and read through it before raising her hand. "Well professor, we have to use our whole name; that is everything on our birth certificate. Then we have to use the Pythagorean Number System to make each letter a number. Then we add each name up individually and continue to add them together until we are left with just one number. The one we call the root number." Iris felt quite proud of herself, the explaination made sense to her and wasn't copied word for word from the book.