Three different positions of the same dice are shown. Find the number on the face opposite the face showing '2'.

5 3 6 1

5

As we are observing, in fig. 1 and 3, that 06 is placed at same place on 1st and 3rd dices. And, in fig. 2, 05 is placed at the place of 06, which is at the top on dice 3. so if we rotate the dice we get 5 opposite to 2. Thus, 05 is correct.