Even Squares

Can you find squares within a number grid whose entries add up to an even total?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem

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In the diagram below, how many squares (of any size) are there whose entries add up to an even total?

1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25