It's true in base 4, called the 'quaternary numeral system', where
counting is done this way.
1,2,3,10,11,12,13,20,21,22,23,30,31,32,33,100,101,102,...
Only the digits 0,1,2, and 3 are used in the quaternary numeral system.
2+2=10 in the quaternary system is not read "two plus two equals ten",
it's read "two plus two equals 'one zero'". "10" in quaternary is really
the same as four in the decimal numeral system, 11 is the same as five, etc.
When counting up, when you get to a 3, you change it to 0 and add 1 to the
next digit to the left if it is not 3. If it is 3, you change it to 0, and
add one to the digit left of it. When all the digits are 3's, the next
number will have one more digit, and will begin with 1 and all the rest
zeros.
Go here to read about it:
https://en.wikipedia.org/wiki/Quaternary_numeral_system
Edwin
