Assuming each of the smallest squares (i.e., each of the 16 ones forming the large square) has a side 1 unit long: There are 16 squares that are 1x1. There are 9 squares that are 2x2. There are 4...
17 squares. 1 of size 4x4, 4 of size 3x3, 9 of size 2x2, 16 of size 1x1 Total 30 but that depends on a particular interpretation of the question (16 squares arranged in a 4x4 group). If the 16 are...