All the faces of cubes are painted with red colour.It is then cut into 64 equal small cubes.Find How many small cubes have no faces coloured ?  Answers.
A) 24
B) 8
C) 16
D) 0
E) 4
There are 64 small cubes,Hence one side side of the big cube is 3√64=4 cm   Number of small cubes having only one faces coloured = (x - 2)^3   Here, x = side of big cube / side of small cube   x = 4 /1= 
<gadget id="calculator">4 /1</gadget>
<output>4</output>
4   Required number= (4 -2)^3   = 8   Answer :8
<result>B</result>
All the faces of cubes are painted with red colour.It is then cut into 64 equal small cubes.Find How many small cubes have no faces coloured ?