There is a count the squares puzzle that seems to be running rampant on the internet.
Here is the picture and the words that go with the puzzle.
PLEASE HELP! I just got into a heated battle with Don (our boss) over this – I got 24 squares, he says 25. How many squares do you see!!?? -Nudge
I decided to answer this silly puzzle once and for all. I’ll post the answer in the comment.
I don’t know what the political implications of this are.

Number the atoms so as to describe the makeup of the 40 squares.
Now assemble the puzzle by overlaying the red squares over the
black squares and count the squares.
Red atoms
in 1 x 1 arrays
Black atoms
in 1 x 1 arrays
Red atoms in
2 x 2 arrays
Black atoms in
2 x 2 arrays
Black atoms in 3 x 3 arrays
Black atoms in 4 x 4 arrays
17, 18, 19, 20, 21, 22, 23, 24
I believe this is a rigorous enumeration of all the possible 40 squares. If you can come up with more than this, please tell me how.