Oh, now she was going to clear the cobwebs from his brain. Back to the Muggle maths stuff he wasn't good at. He strained his mind to remember. He must've looked in pain, because Treyen actually looked concerned.

Soul urge... life path... ok, think Keef! He got something, but whether right or not he wasn't sure. And the soul urge number was nowhere in his mental filing cabinet.

He raised both hands. Only for Hadley would he willingly put his neck out there with a likely wrong answer. "Those are Core Numbers, right? I can't remember a thing about the Soul Urge number, but the Life Path is sorta coming back. It's all about your personality and what characteristics you will need to help you succeed in life. Kinda like a guardian or tour guide in a sense, no? As far as calculations..."

He trailed off. How on earth would you explain it? "You assign numeric values based on the day, month, and year of your birth. You reduce the separate parts to a number one through nine and then add those three digits. It's sort of hard to explain." He had newly found admiration for teachers. Arithmancy really required practice and demonstrations.