A: What time is your math/Math class?

B: At eleven forty-five.

Do we have to use 'math' or 'Math'?

And is it a common noun or a proper noun?

You use "math" when you're making a general reference to the class, whether it's Algebra I or Geometry or whatever.

You use "Math" when it's part of the formal name of the course. "When I was a senior in high school, my math course was called Math IV."

If "Math" is the specific title of that particular class, then use the capital. Otherwise the lower case is fine. However, specific titles typically include some numerical designation, such as "Math 101."

I hope this helps. Thanks for asking.

-2.4578*698

"math" and it is a common noun

My math is 8:32 to 10:02. Math is a common noun.

In this case, both "math" and "Math" can be used interchangeably to refer to the subject of mathematics. Neither one is more correct or formal than the other. It is largely a matter of personal preference or regional variation.

As for whether "math/Math" is a common noun or a proper noun, it is considered a common noun. Common nouns are general names for people, places, things, or concepts, whereas proper nouns are specific names of people, places, or things. In this case, "math/Math" is a general term for the subject of mathematics, rather than a specific name.