I propose that on Mars, much like their gaming pieces, local civilizations count using a pyramid-like system as well. Furthermore, it's only logical that they would have planted this information into the earliest Earthlings, providing the basis of what ultimately developed into the Roman-style numeral system we know today. Accordingly, I have modified the numbering of my Starship Captains list as such. Just sayin!
Neat... but why didn't you stay consistent with the progression of shapes after inverting them? Shouldn't the progression be:
1 = /\
5 = (white triangle)
10 = (black triangle)
50 = \/
100 = (invert white triangle)
500 = (invert black triangle)
1000 = (white diamond)
10000 = (black diamond)
[The bold shows where I flip-flopped your progression.]
For ease of remembering the more common numbers, I kept the open triangles common to 1's, and the closed triangles common to 5's:
1 is Λ, 100 is V
5 is Δ, 50 is ▽
I also considered the following, rotating the characters clockwise as the value increases - this would be more progressively uniform like you mentioned - but in the end I decided I simply liked the visual aesthetics of the more varied characters in the original post:
1 is Δ, 10 is ▷, 100 is ▽, 1000 is ◁, 10000 is ◇
5 is ▲, 50 is ▶, 500 is ▼, 5000 is ◀, 50000 is ◆
Thanks for taking a long enough look to question that!
What he said. I would have swapped your 50 and your 100.
But otherwise, really neat. Well done! =)