Six faces of the cube are painted with different colors as shown below. In figure 3, which color is opposite to RED?

From the above given diagram , we can say that
Six cubes are visible and four cubes are hidden.
Thus , there are 10 cubes .

We follow the given pattern :-
Symbols ?, ?, ?
and ? lie on the faces adjacent to the symbol *Omicron;.
Therefore,? lies opposite ?.

As per the given pattern in question figure , we can find the similar next position of given dice .
The shape given in the option (3) is not appropriate.

We follow the given pattern :-
After folding the sheet of paper in the form of a cube:
? will lie opposite ?
? will lie opposite ?
? will lie opposite ?
Symbols ? and ? cannot be on adjacent faces.
So, Answer Figure (3) can be ruled out.
Symbols ? and ? cannot be on adjacent faces.
So, Answer Figure (4) can be ruled out.
? and ? can not be on adjacent sides.
Hence options (1) is not true.
Hence option (2) is true.

As per the given pattern in question figure , we can find the similar next position of given dice .
The seven colours of a Rainbow are: Violet, Indigo, Blue, Green, Yellow, Orange and Red.
Thus, Violet colour of rainbow is left out.

As per the given pattern in question figure , we can find the similar next position of given dice .
Yellow, Green, Blue and Violet are on the faces adjacent to Red colour.
Therefore, sixth colour is opposite to Red.
From the four views of cube, it is clear that yellow is opposite to Blue.

There are total 42 cubes present in the upper portion.
Then total cubes be 42 × 2 = 84
Second method to find out the number of cubes/blocks.
24 columns with 2 cubes each = 24 × 2 = 48
14 columns with 2 cubes each = 28
4 columns with 2 cubes each = 8
Total cubes = 48 + 28 + 8 = 84

There are 20 cubes.

15 × 3 + 13 × 2 + 11 × 1 = 82 cubes

Number three is common in both the figures we assume the block in figure (ii) to be rotated so that three appears at the same position as in figure (i) and the numbers 5 and 2 move to the faces hidden behind the numbers 4 and 6 respectively. Thus the combined figure will have 3 on right hand side face, 4 on the front face, 6 on the top face, 5 on the rear face and 2 on the bottom face. Clearly when 2 is at the bottom, then 6 is at the top.