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Cube and Cuboid

Directions to SolveThe following questions are based on the information given below:
  1. All the faces of cubes are painted with red colour.
  2. The cubes is cut into 64 equal small cubes.
Q1:

How many small cubes have no faces coloured ?

A 24

B 8

C 16

D 0

ANS:B - 8

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 x = 4 Required number = (4 -2)3 = 8



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