Question

which number will occur on the face opposite to 4?

Answer 1

Opposing sides on a standard six sided die will always add up to seven.

Answer 2

Understand? :o

So opposite the 6 is going to be the 1, because 6+1=7
Opposite the 2 will be the 5, because 2+5=7

So opposite the 4...? What you think? :O