A cube of 3 units is painted on all sides.If this cube is divided into cubes of 1 unit,how many cube
have none of their faces painted?
(a)...
(b)2
(c)1
(d)0
(e)none of these

• No. of cubes whose none of the face painted:
  (X/x-2)^3, where X represents the side of the larger cube and x represents the side of the smaller cube
  (3/1-2)^3=1(option C)
• 12 years agoHelpfull: Yes(8) No(0)
• answer c.
  remove all outside cubie only cube which is in center covered by all outer cube is not painted any face.
• 9 years agoHelpfull: Yes(2) No(1)
• Cubes with no painting = (n-2)^3
  So here n = 3
  Ans: 1
• 9 years agoHelpfull: Yes(0) No(0)