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"Nueve" is an adjective which is often translated as "nine", and "treinta" is a noun which is often translated as "thirty". Learn more about the difference between "nueve" and "treinta" below.
nueve(
nweh
-
beh
)An adjective is a word that describes a noun (e.g., the big dog).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
a. nine
El nueve en la portada del libro representa la edición.The nine on the cover of the book represents the edition.
b. ninth (in dates)
El nueve del mes que viene es mi cumpleaños.The ninth of next month is my birthday.
el treinta(
treyn
-
tah
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
b. thirtieth (in dates)
El cumpleaños de mi padre es el treinta de noviembre.My father’s birthday is on the thirtieth of November.