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Triangular Matrix

How many cube...

Question

How many cubes will have only one face shaded?

A

24

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B

16

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C

32

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D

20

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Solution

The correct option is C 24
No. of cubes have only one face shaded $= (n - 2)^{2} \times 6$
$= (4 - 2)^{2} \times 6 = 24$

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