Riley had to think for a little bit on this question. He eyed the Professor intently, hoping that something in that face would give the answer away but sadly he was not able to get Arithmancy help from body language and the boy was far from a mind reader so he popped open his textbook and quickly looked up the different types of numbers until he was able to find the one he was looking for. "Umm Professor, I think the one you are talking about is the Life Path Number, it won't change if you use the Pathagorean." he nodded matter-of-factly.