rétt

In a sentence

• Þú ert með rétt svar.

  You have the correct answer.

  Here, 'rétt' is used as an adjective meaning 'correct' or 'right', qualifying the noun 'svar' (answer).

• Vinsamlegast farðu rétt að í verkefninu.

  Please proceed correctly in the task.

  In this sentence, 'rétt' functions as an adverb, meaning 'correctly' or 'rightly', describing the manner of performing the action.

• Ég mætti á réttum tíma.

  I arrived at the correct time.

  Here, 'réttum' is the dative singular form of 'rétt', used as an adjective meaning 'correct' to fit grammatical agreement with the noun 'tíma' (time).