A dice has letters A, B, C, R, S and T on its sides. Two different positions of the same dice are shown below. Select the letter that will be on the face opposite to the one having A.

The correct answer is T.

To find the letter on the face opposite to the face with the letter A, we can analyze the adjacent faces shown in the two different positions of the dice:

1. In the first position of the dice, the face with A is adjacent to the faces with C and B.
2. In the second position of the dice, the face with A is adjacent to the faces with R and S.

A standard six-sided dice has six faces. For any given face, there are exactly four adjacent faces and one opposite face.
From the given positions, the faces adjacent to A are: B, C, R, and S.

Since the six letters on the sides of the dice are A, B, C, R, S, and T, the only remaining letter that is not adjacent to A is T.
Therefore, the face opposite to the one having A must be T.