"A difficult exam."
Translation:Un examen difícil.
I have written down a rule... Adjectives fall after nouns, with 'de' in between. e.g. Una hamburguesa de queso
When do you know whether to have the 'de' in between the noun and adjective?
I wrote 'Un examen de dificil' and the correct answer I was given is 'Un examen dificil'