Three different positions of a standard dice show that the faces adjacent to 4 contain the numbers 2, 3, 1, and 5. Which number is on the face opposite to 4?

In a standard test of a non-standard dice with letters, three views of the same dice are shown containing faces with letters A, B, E, I, R, U. If A is adjacent to B, E, R, I, which element lies on the face opposite to E?

Two different positions of the same dice are shown, the six faces of which are numbered from 1 to 6. If the number opposite to 2 is 5, select the number that will be the result of the sum of 2 and the number appearing opposite to 2.