9
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Now that I've had a chance to take a minute and really look at it 18 is what I'm seeing. Of course I could be wrong, it wouldn't be the first time.The answer is 18. Where did yall go to skool?
eight 1x1 squares, five 2x2 squares, four 3x3 squares, and one 4x4 square.
8+5+4+1=18