Yes, Hindu-Arabic system have only 9 symbols.
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9
Because we use the decimal system which has only ten symbols - for the numbers 0 to 9. In the decimal system, every time you get to a power of ten, the number starts one further place to the left.
It is called Hexadecimal
Primitive digits (symbols)in a base 10 system
The symbols used in the Hindu/Arabic system of numbers are; 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0.