What number is opposite to 3 in the dice shown below, the given positions are of the same dice.

5

In this given figure we can see that, There are six faced named 1,2,3,4,5 and 6

and five is not opposite to 1,2,4,6 as we can see in the figure.

So, only 3 is remaining from the above faces. So, we can say that five is opposite to 3.