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Dice and Cube

Dice is also said to be Cube. Dice or cube are having 6 faces. Always four face are adjacent to one face.There are certain rules with the help of these rules question on dice can easily determined.
Rule No. 1:
Two opposite faces cannot be adjacent to one another.
Example:
Two different positions of a dice are shown below. Which number will appear on the face opposite to the face with number 4?
d1
Explanation-
Faces with four numbers 6, 2, 5 and 3 are adjacent of to the face with No. 4.
Hence the faces with no. 6, 2, 5 and 3 cannot be opposite to the face with no. 4.
Therefore the remaining face with no.1 will be the opposite of the face with no. 4.

Rule No. 2:
If two different positions of a dice are shown and one of the two common
faces is in the same position then of the remaining faces will be opposite
to each other.
Example:
Two different positions of a dice are shown below.
d2

Explanation-
Here in both shown positions two faces 5 and 3 are common.
The remaining faces are 2 and 4.
Hence the number on the face opposite to the face with number 2 is 4.

Rule No. 3:
If in two different positions of dice, the position of a common face be the
same, then each of the opposite faces of the remaining faces will be in the
same position.
Example:
d3
Explanation-
Here in both positions of common (3) is same.
Therefore, opposite of 5 is 6 and opposite of 4 is 2.

Rule No. 4:
If in two different positions of a dice, the position of the common face be
not the same, than opposite face of the common face will be that which is
not shown on any face in these two positions. Besides, the opposite faces
of the remaining faces will not be the same.
Example:
d4
Explanation-
Here in two positions of a dice the face with number 1 is not in the same position.
The face with number 6 is not shown.
Hence the face opposite to the face with number 1 is 6.
Besides the opposite face of 3 will be the face with number 2 and opposite face to face 5 will be the face with number 1.