Hogwarts academics
Hogwarts Magic and magical theory

Arithmancy class

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The Harry Potter Canon

"Arithmancy looks terrible," said Harry, picking up a very
complicated-looking number chart.
"Oh no, it's wonderful!" said Hermione earnestly. "It's my favorite
-- (PA6)

Arithmancy class is taught at Hogwarts by Professor Vector.

  • In Professor Vector's class, students are expected to write essays and to be able to understand complicated number charts, which are part of their homework (PA12).
  • Hermione Granger appears to be the only Gryffindor in her year who attempted an O.W.L. in this subject (which is her favourite) (PA12, PA16).


Tags: homework math numbers