From the following two different appearance of dice, find out the number which is opposite to ‘1’ ?

6

If a common pair of numbers are given in two different views of a dice then the number showing on the third face of both the views are opposite to each other.

Here,

In figure (I) and (II) 2 and 3 are common in both the different views of a dice

Therefore, 1 is opposite to 6.