SSC CHSL Model Paper 2

Question : 8 of 100

Marks: +1, -0

A solid cube of each side 8 cm, has been painted red, blue and black on pairs of opposite faces. It is then cut into cubical blocks, each side 2 cm. How many cubes have no face painted?

Validate

Solution:

Cubes that have no face painted = Inner Cubes
We can find out the total number of cubes without any color on any side (inner cube) with this formula:

(x -2)^3

Then

x =8/2= 4

Cubes that have no face painted

= (4 -2)^3

Cubes that have no face painted = 8

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