6
sorry it's late but hopefully it can help someone else
3. 572/1000 4. 9 23/1000 5. 45/100000 6. 9 875/1000
The flat surfaces of a 3D shape are called faces
The first one means what is the smallest number that goes into 12 which would be 4. The second one mean what does not go into 4 and 6 so that would be 8 because 6 is not a multiple of 8.The third one is either 1 or 2 not sure. And the 4th one is little complicated you might want to look up video on prime factorization that can really help you .
I think it is game engine developer or ui