"Oh, I'm afraid the things that interest me are the opposite of useful," he teased. He did use some math and arithmancy in his work, as it related to complex magical theory, but the sort of things that he found really fascinating went beyond daily application.

The staff member who had topped off her wine raised an eyebrow to silently ask if he wanted a drink as well and he nodded. The man nodded in return and cast a spell to summon a glass.

"There's a way to set up an equation that makes it something like a riddle," he explained with a grin. "Things that are mathematically proven but logically impossible, like an imaginary number."

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