We're learning about quantitative adjectives like ander-, einig-, viel-, and so on in German.
We were presented with the following sentence that's supposed to be demonstrating weak declension of the adjective(s):
Ich habe der Frau jedes einzelne Foto gezeigt.
How is this a weak declension? It's weak only for einzelne, but jedes here is strongly declined is it not? Since it's "das Foto", and therefore "jedes ... Foto". Why wouldn't "einzelne" also be "einzelnes"?