Ikke hvis vi må gjøre norsk! Vi gjør det i vår fritid ;)
Perfect grammar, although it's more common to say 'fritiden (vår)'.
"færreste" without "De" works as well?
You need "de" here to turn the adjective "færreste" into a makeshift noun.
Why "lekser" and not "leksene"? Because there's no determiner?
Would "the minority" be an acceptance translation of "de færreste"?
"mindretallet" i think!
Well, when I had norwegian class in university, I actually loved doing homeworks. I guess this language is kind of magic.