Binary, octal, hexadecimal and decimal carry different name suggests is different:
In case of a decimal decimal, 10, 19 + 9 + 1 = 1 + 1 = 200 = 20,199. Before the same number of times one after one, for example 11, a representative of the former 10, the latter is 1.
A binary binary case, 1 + 1 + 1 = 10, 10 = 11, 11 + 1 = 100. It will be appreciated that for each access to an occupied position values, median values of n, is 2 ** (n-1)