In the given sentence, "15" is a cardinal number that represents the number of players in each team. Therefore, "15" is a numeral adjective.
What is a Numeral Adjective?
A numeral adjective is a type of adjective that describes or modifies a noun by indicating the quantity or number of items it refers to. These adjectives are used to count, enumerate, or specify the number of objects, persons, or things, etc.
Examples of numeral adjectives are "one," "two," "three," "four," "five," "six," and so on. They can also include words that express the order or sequence of things such as "first," "second," "third," etc. Additionally, there are fractional numeral adjectives that express a part of a whole, such as "half," "quarter," "one-third," etc.
Numeral adjectives can be classified into three types: cardinal, ordinal, and distributive.
1. Cardinal numerals - These are adjectives that express a specific number or quantity of something. For example, "two apples," "ten cars," "three books."
2. Ordinal numerals - These are adjectives that express the position or order of something in a sequence. For example, "first place," "second rank," "third paragraph."
3. Distributive numerals - These are adjectives that express the distribution of something among a group of people or things. For example, "each student," "every child," "either book."
It is important to note that numeral adjectives are different from quantitative adjectives which indicate the amount or quantity of something in a non-specific way, such as "many," "few," "some," etc.