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raja gupta

· started a discussion

· 1 Months ago

answer should be 1 (Question: 195035.0 )

a cube has 6 faces. 5 of them are completely painted. one face is left unpainted, only the central cube of that face will have all sides unpainted, rest all will have atleast one face painted, please explain

Question:
27 small cubes of equal size are alligned in such a way that a bigger cube could be formed. Now five faces of this big cube are painted with red colour and remaining faces are left unpainted. Then how many cubes are there which have no face painted ?
Options:
A) 2
B) 4
C) 1
D) 6
Solution:
Ans: (a) CDGH is left unpainted and centre place of this face gives one unpainted cube. And centre part of this cube also gives one unpainted cubes.


= 1 + 1 = 2 

Knowledge Expert

· commented

· 1 Months ago

Dear student,

Please read explanation carefully, the central part of the whole big qube gives a unpainted small cube and unpainted surface give a small cube at the center.

Keep learning with us!!
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prashant

· commented

· 1 Months ago

how can u paint the core cube
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