Questions & Answers about Den er billig, men liten.
Den is a third‑person singular pronoun meaning it (or that) for a gendered, non‑neuter noun – that is, a noun that is grammatically masculine or feminine in Norwegian.
If the thing being talked about is an en‑word (masculine/feminine), like en bil (a car), en veske (a bag), en bok (a book), you use den:
- (Bilen) Den er billig, men liten. – (The car) It is cheap, but small.
If the thing is a neuter noun (an et‑word), you would normally use det instead:
- (Huset) Det er billig, men lite. – (The house) It is cheap, but small.
In this sentence, context (not shown here) must be some en‑word noun, so den is used.