1) Adj of quality- that describe the quality of an object or person . Eg. red , pretty , ugly,sweet ,nice etc.
2) Adj of quantity - that indicate the quantity of an object- used for uncountable objects. Eg. some ,more ,few etc.
3) Adj of number- that indicate the number of an object or any living being.Eg. 3ppl ,10 balls ,40 students etc.
That's all i know .Hope u lyk it .