"You are the most intelligent one in the class."
Translation:Tú eres el más inteligente de la clase.
How would I know to express "the most intelligent" as "el mas inteligente"? Why is it "el" and not "la"?
I put "la" and that wasn't marked wrong. But sadly, "en la clase" was. :(
Inteligente is one of the adjectives that doesn't change for gender (unlike caro or cara for expensive), so either el or la is correct depending on the subject you are applying the adjective to, in the case of this question there is no context, therefore either should be accepted.
It can be either, since we don't know if the speaker is talking to a male or female person.