> Reals numerical systems are much more diverse than that. For instance, Babylon used a base 60 (hence our minutes and hours). But there were much less than 60

> Reals numerical systems are much more diverse than that. For instance, Babylon used a base 60 (hence our minutes and hours). But there were much less than 60 numeric symbols, since they had a symbol for 1 and 10. So 2 symbols for a base 60! It's oddly similar (obviously not identical) to bi-quinary: https://en.wikipedia.org/wiki/Bi-quinary_coded_decimal https://en.wikipedia.org/wiki/Bi-quinary_coded_decimal .