What are some practical uses for Arithmancy? Hmm..

Messer was going to say Life Path Number but Ella was preceded him. Darn!

Then he heard the Ravenclaw Captain said something about numbers can figure out other Quidditch teams tactics. Now that got his full attention. His eyes went from the Captain to Kurumi while they're doing a little discussion about that matter. He decided to listen to them while waiting what Professor Hadley would say since he's never really good with Arithmancy.