Other pronouns can also be used as adjectives, but they are not always adjectives as the seven mentioned in Lesson 31. Demonstrative pronouns, this, that, these, those; interrogative pronouns, whose, which, what; and indefinite pronouns, another, any, both, each, either, many, neither, one, other, some; when used with a noun become adjectives. Cardinal and ordinal numbers can be adjectives. Examples: ten students (cardinal), the tenth student (ordinal). Pronouns used as adjectives are called pronominal adjectives.
For your convenience, all of our lessons are available on our website in our lesson archive at http://www.dailygrammar.com/archive.html.
from Daily Grammar Lessons Blog http://dailygrammarlessons.blogspot.com/2018/10/lesson-32-parts-of-speech-adjectives.html