N
number 11
Guest
A cube has 6 faces and 12 edges. You start at one corner, are allowed to move only along the dges, and may not retrace your path along any edge. Consistent with these rules, there are a number of ways to arrive back at your starting point. How many ways are there to arrive back at your starting point that involve 8 displacement vectors that add to zero?
how do you figure this out?
how do you figure this out?