Choosing between the Adjective of Quantity and the Adjective of Number Part 1

Adjectives which show the quantity of a thing are called Adjectives of Quantity. Adjectives of Quantity answer the question “How much?”
 

I had little food.
 

Adjectives of number answer the questions “In what order?” and “How many?”
 

The fourth boy is the monitor. (In what order?)
 

There are some men in the room. (How many?)