Four forms of a dice are shown below. In this dice, which number will be on the surface opposite to the number ‘1’ ?

5

Here we can find the opposite of 1 from the 1st and 2nd figure:

Rotate the dice in clockwise direction starting with common number :

1st : 1     2      3

       ↓      ↓      ↓

2nd: 1     4      6

Here we can see the remaining number is 5, which is opposite to 1.

Therefore, 5 is opposite to 1