Arithmancy
From Harry Potter Wiki
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- "Oh, it's wonderful! It's my favourite subject!"
- —Hermione Granger[src]
Arithmancy is a Hogwarts subject taught by Professor Vector. It comes from the Greek arithmo, meaning "number" and mancy, meaning "prophecy." This subject is taught in Classroom 7A, on the Castle's seventh floor. It is Hermione Granger's favourite subject and involves complicated number charts, but nothing else is known about the subject.
It is apparently a more accurate (or at least more accepted) way of predicting the future, similar to an obscure but existing hobby of numerology - the belief that number patterns existing in real life can be calculated to give information regarding the future. This would make it a more sensible version of Divination, at least to Hermione's taste, in that it does the same thing through more appropriate or exacting means. The accuracy of this information is unknown, however.
