Various symbols are used as numerals to make numbers. A system with base 10 (the normal decimal system), normally uses the symbols "0", "1", "2", "3", "4", "5", "6", "7", "8", and "9". The numbers 0 to 9 can be written as one symbol, "0" ... "9". To count past 9, symbols have to be put together. "10" can be seen as "1" in the tens' place and "0" in the ones' place, or as "1 times 10 plus 0 times 10". With a base of 2, only the symbols "0" and "1" are used. "10" in base 2 notation is therefore "1 times 2 plus 0 times 2". This is the same as 2, in the base 10 notation.