Two different positions of the same dice are shown, the six faces of which are numbered from 1 to 6. What is the sum of the numbers that are opposite '5' and '4'?

5

Step 1) In figure 1  and 2

Step 2) Compare both the figure and we find out 5 and 4 both are common

Step 3)  Therefore 6 is the number which will be opposite to 1

Step4) In an dice its is confirmed that there are 1 to 6 numbers . From step 3 It is clear that 2 and 3 will be opposite to 5 and 1. therefore sum of their opposite number is (3 +2 = 5)