20 points if you can help me with problem 2.

Answer:
3, 4, 5, 6, 7, 9, 10, 11
Step-by-step explanation:
Actually it's 10 points but whatever:
I number the figures like this:
1, 2, 3
4, 5, 6
7, 8, 9
3, 4, 5, 6, 7, 9, 10, 11 work because if you cut them out and glued the sides correctly, it will become a cube.