One item is filed under this topic.
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
Every vertex of a cube is assigned a number +1 or -1 |
2013-04-01 |
![](/images/transparent.gif) |
From Shankar: Every vertex of a cube is assigned a number +1 or -1 . Every face has a number that is the product of all the numbers in its corners. Then the 14 numbers are summed up ( all the vertices and faces ). Can the sum be 0? Answered by Chris Fisher. |
![](/images/transparent.gif) |
![](/images/transparent.gif) |
|