vs 

QUICK ANSWER
"Cincuenta y nueve" is an adjective which is often translated as "fifty-nine", and "noventa y uno" is an adjective which is often translated as "ninety-one". Learn more about the difference between "cincuenta y nueve" and "noventa y uno" below.
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. fifty-nine (cardinal)
Hay cincuenta y nueve parques regionales en la zona.There are fifty-nine regional parks in the area.
b. fifty-ninth (ordinal)
Nos hemos reunido hoy aquí para celebrar el cincuenta y nueve aniversario de la creación de esta ONG.We have gathered here today to celebrate the fifty-ninth anniversary of the creation of this NGO.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. fifty nine
El cincuenta y nueve es mi número de la suerte.Fifty nine is my lucky number.
Copyright © 2025 Dictionary Media Group, Inc.
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. ninety-one (cardinal)
Hay exactamente noventa y un escalones hasta el campanario de la iglesia.There are exactly ninety-one steps to the church bell tower.
b. ninety-first (ordinal)
Hoy celebramos el noventa y un aniversario de nuestra firma, que fue creada por mi abuelo.We celebrate today the ninety-first anniversary of our firm, that was set up by my grandfather.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. ninety-one
Cien menos nueve son noventa y uno.One hundred minus nine is ninety-one.
Copyright © 2025 Dictionary Media Group, Inc.