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"A las diez" is a phrase which is often translated as "at ten", and "veinte" is an adjective which is often translated as "twenty". Learn more about the difference between "a las diez" and "veinte" below.
a las diez(
ah
lahs
dyehs
)A phrase is a group of words commonly used together (e.g., once upon a time).
veinte(
beyn
-
teh
)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)
b. twentieth (in dates)
El veinte del mes que viene me voy a España.I'm going to Spain on the twentieth of next month.