#1**+2 **

Solution:

Let's list out the ways that the red faces don't add up to 7.

1+3

1+2

1+4

1+5

2+3

2+4

So, that is 6 ways that this works.

Please tell me if I am correct.

CalTheGreat Mar 28, 2020

#5**+2 **

The ways to paint the red faces are:

1 and 2

1 and 3

1 and 4

1 and 5

2 and 3

2 and 4

3 and 5

3 and 6

2 and 6

4 and 6

4 and 5

5 and 6

So 12 ways. I see my mistake!

CalTheGreat Mar 28, 2020