>>16739270
>but 8 isn't divisible by three
Wrong :

[math]8_{base10}/3_{base10}=22_{base3}/10_{base3}[/math]
[math](8/3)_{base10}=2.2_{base3}[/math]

Same reason with :
>>16739270
>and 13 isn't either

13 in base 10 is 111 in base 3.
...
...
11.1

Go back to College plz.

>>16738112
Australia was colonized by Dutch and Brits in the 17th and 18th.