"Biscuit" is countable. It makes sense to talk about two biscuits, 250 biscuits, or more.
For uncountable nouns, it makes sense to talk about amounts, not specific numbers. For instance, consider the word "butter": you might use 1.5 cups of butter to make the biscuits, but you would not say that you used 1.5 butters. This demonstrates that "butter" is an uncountable noun.
Well, honey, "biscuit" can be both countable and uncountable depending on the context. If you're talking about individual pieces, like "I ate three biscuits," it's countable. But if you're talking about the general concept or a mass quantity, like "I love biscuit with gravy," then it's uncountable. So, it's flexible like a gymnast, darling.
Transport is both countable and uncountable as a noun.
countable
uncountable
Uncountable
uncountable
The gerund painting is a countable noun, as in "There are 12 paintings in this room."
few is countable
countable
Countable
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
he asked me if the word fire wood countable or uncountable?