What part of speech is eleven?

"Eleven" can be a few different parts of speech depending on how it's used:

* Noun: When it refers to the number itself, like "There are eleven people in the room."

* Adjective: When it describes the quantity of something, like "I have eleven apples."

* Numeral: When it represents a specific quantity, like "I counted eleven cars."

So, to know the exact part of speech, you need to see how it's used in a sentence.