Three positions of the same dice are given. What will be the digit on the face opposite to the face having the digit 3?
[Note: Consider three standard views of a dice showing numbers on faces.]

From the rules of dice:
If two positions show two identical faces, the remaining third faces on both positions are opposite to each other.

Also, any faces adjacent to a digit cannot be opposite to it.

By comparing the given positions of the dice, we observe the adjacent faces of 3 to find the only remaining possible face, or by applying the common-face rotation rule between any two positions, we find that the face opposite to 3 is 6.