Two different positions of the same dice are shown, the six faces of which are numbered from 1 to 6

Two different positions of the same dice are shown, the six faces of which are numbered from 1 to 6. Select the number that will be on the face opposite to the one showing 6.

(a)          3

(b)          4

(c)           2

(d)          5

Sol:

2 and 5 are common in both dice, so 3 would be opposite of 6.