1Ian FowlerNov 16I'm assuming that the edges are:123, 369, 9, 0, 7 , 741and that repeated digits are allowed - 113 and 686 - for example.3^3 + 3^3 +3^3 - 1 - 1 + 1 = 803^3 accounts for the left, top, right edges-2 as the cubes count 111 and 333 twice+1 for 000777 and 999 are counted by the cubes
Do 470 , 705 (for example) count as edges?
Ian fowler no since they dont share an Edge
I'm going to go with 80.
Hmmmm... i got 50.
Maybe I counted duplicates. Give me a day to re-think it.
I'm assuming that the edges are:
123, 369, 9, 0, 7 , 741
and that repeated digits are allowed - 113 and 686 - for example.
3^3 + 3^3 +3^3 - 1 - 1 + 1 = 80
3^3 accounts for the left, top, right edges
-2 as the cubes count 111 and 333 twice
+1 for 000
777 and 999 are counted by the cubes
Oops, sry, should’ve been more specific. Repeated digits not allowed.
Fair enough. Thanks - Ian