9
I kind of had this epiphany while talking with some friends about different interesting numeral systems and their various advantages and disadvantages. I ended up thinking this system up while I was in the shower, went back to my desk and knocked it out in an hour or so. It takes aspects of the Kaktovik numeral system invented by the Inupiaq tribe, and combines them with some aspects of the Cistercian numerals.
I think that this numeral system fusion can look very wizard-y, and be easy to write and do math with.
I've abbreviated it as b10CK, which I think is pretty clean.
