"How many white bowls are there?"

Finished today's Korean lesson handling numbers and colors; "How many green apples do you have?"
I'm still not really getting the hang of plenty of things that I learn. Rosetta Stone is efficient to learn vocabulary, but being the grammar freak that I am, I'm getting more and more bugged about not understanding why at certain moments a word would end in one way, and completely different in another sentence... one says that a picture tells a thousand words, well I say a picture doesn't explain grammar rules.^^
Thank God for Luke Park's Grammar Guide!

See how pretty my Hangeul writing is?