What would be the symbol on the opposite side of '*' if the given sheet is folded to form a cube?

The correct option is %.

When folding an unfolded net of a cube into a 3D cube, we can determine the opposite faces by examining the layout of the squares:

1. In a vertical or horizontal line of connected faces, alternate faces (faces separated by exactly one face) are opposite to each other:

- The face containing @ is opposite to the face containing $.

- The face containing ¥ is opposite to the face containing #.

2. The remaining two side flaps attached at opposite corners/ends will fold to cover opposite sides of the cube:

- The face containing * (top-left flap) is opposite to the face containing % (bottom-right flap).

Therefore, the symbol on the side opposite to * is %.