In principle, any number can be represented by any number system, whether the latter be base 10, base 60, base 3 or base 2. The math works perfectly in each case. In the usual decimal system, the ...

They find that the former Mangarevans combined base-10 representation with a binary system. They had number words for 1 to 10, and then for 10 multiplied by several powers of 2.