arithmetician

noun
UK /əˌrɪθməˈtɪʃən/
US /əˌrɪθməˈtɪʃən/

A person who is very good at math with numbers.

The arithmetician solved the puzzle in seconds.


OTHER MEANINGS

2. A person who studies or teaches arithmetic.

Our teacher is a true arithmetician who makes numbers fun.

3. Someone skilled in computing with numbers.

The old merchant was a clever arithmetician and never made a mistake.

4. An expert in the theory of numbers.

As an arithmetician, she loved exploring patterns in numbers.