What's the difference between "hvilke" and "hvilken"? Is it about the common, neuter and plural?
Hvilken kat. (kat is a n-word. Katten)
Hvilket sted. (sted is a t-word. Stedet)
Hvilke biler. (biler is plural)
You learn it with each new word. It's like when you learn French and you need to know if the new vocab is masculine (il)or feminine (elle)