From first figure to second figure the design becomes upside down, i.e., rotates through 180°. Alternatively, the second figure is the water image of the first figure.
According to given question figure ,
we can say that the mirror image always be opposite the original image across the given line. Given image will become opposite in mirror across the given line MN.
Since total number of cubes is hence in the formula we will substitute n = 6
Number of the cubes with 2 faces painted is 6(6 - 2)2
= 6 x 16 = 96
2, 3, 4 contain straight lines each dividing, the figure into two equal parts.
7, 8, 9 have one element placed inside a different element.
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