I just knew the wording was wrong for this puzzle. I start again, and yes, I have built a model.
a) Three identical pyramids.
b) One footprint.
c) Two built along opposite sides of first.
"Unless 'stick' allows placing a side against a side.
Are the base and sides regular? "
Yes, and yes.
Should you sail round the island, how many surfaces will you see
Talking about pyramids, what about this!
You have a small pyramidal structure (4 sides, 4 points, and 6 edges). Two ants rest at two different points on the pyramid. They simultaneously move to different points on the pyramid, moving along an edge of the pyramid. They arrive at their new points at exactly the same time, and then begin again toward different points. If they can never touch the same edge twice (regardless of which ant touched it - Ant A can't touch the same edge touched by Ant B, for example), and can never meet on any point or edge.
What is the maximum number of different edges the ants can traverse
What is the answer to the preceding problem for three ants
How about for four ants