Two different positions of the same dice are shown, the six faces of which are numbered from 7 to 12. Select the number that will be on the face opposite to the one showing '8'.

12

Step 1) In figure 1  and 2

Step 2) Compare both the figure and we find out 9 and 10 both are common

Step 3)  Therefore 12 is the number which will be opposite to 8