Numbers are adjectives when placed in front of a noun.
I have three brothers.
Mom baked two cakes.
The five boys make a good team.
Each of the numbers in these sentences works as an adjective, telling more about the noun that follows.
Ordinal numbers are also adjectives.
Julie is in first grade.
John won second place in the race.
Dad’s fifty-first birthday is next week
Number words act as adjectives when placed before a noun to modify that noun.
It’s your turn. Find the adjective in this sentence: Seven trees in our yard are maples. Did you figure it out? Good for you!