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Solution to: Placing Bricks

Here is an overview of the number of squares of each size, as they are present in the figure: 

9×9:  22 - 2 = 2
8×8:  32 - 2 = 7
7×7:  42 - 2 = 14
6×6:  52 - 2 = 23
5×5:  62 - 2 = 34
4×4:  72 - 2 = 47
3×3:  82 - 2 = 62
2×2:  92 - 2 = 79
1×1: 102 - 2 = 98
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Total: 366 squares.

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