This is the 8110th most frequent Spanish word.
nº
"nº" is the abbreviation for "número," meaning "number" in English.
Here, 'nº' is used as an abbreviation for 'número' to specify a bus number.
El autobús nº 5 pasa por el centro de la ciudad.
Bus nº 5 goes through the city center.
In this context, 'nº' denotes a specific question number within the test.
La pregunta nº 12 del examen era la más difícil.
Question nº 12 on the test was the most difficult.
Here, the abbreviation 'nº' represents a ticket number in the raffle.