acidburnfx
Senior apprentice
Loyaler
16 squares --- 8 small ones, 8 double the dimensions of the smalls.
There are of course numerous square-like shapes, but those have intersecting line segments that negate the "squaritude" of the geometry. e.g. the L shaped pieces, with the addition of a small square, could appear as one double dimensioned square, but it really is not a square, it is two separate geometric figures.
Unless this is shown on a screen with square pixels. then of course there are thousands upon thousands of squares.
Try to look again! The observation skill is very important. It can make you a more perceptive person. If you find it necessary, take a piece of paper and list all the squares, this will help you.