3 kein/e/n is being used in this table to show the plural because you can say 'no shoes' – keine alten Schuhe – but not 'an old shoes'. By using the tables above, you can work out which ending ...
Similarly, if you describe a noun using a number, this is called a quantitative adjective. These adjectives indicate how many or how much. I have twenty pounds in my wallet. There were three boys ...