I have seen the usage of "one" in the following kind of sentences:
My favorite painting is a landscape one.
Here, I want to know whether the word "one " is used appropriately. I think "one" is used as determiner here. I have never seen any other numeral being used in this way.
The complete description is as follows: I like to look at different kinds of paintings. My favorite painting is a landscape one. I consider that nature is instilled with a lot of beauty and the same is depicted by a painter through his brush and colors in such kinds of pictures.