Hola Peter

You're right. You can also put the adjective after the noun (which is actually more common). We put it in front here for emphasis. We'll add this to the challenge as also correct. 

Saludos

Inma

I understood that nuevo before a noun means “new to me” and after means “brand new”, as nuevo coche - a car new to me but coche nuevo - a brand new car. Dunno if I’m right though!

Sometimes if you put an adjective before a noun it makes a different meaning.