Only one at a time.
ten (0-9).
The number system we commonly used, known as the decimal system, has 10 digits (0 to 9). It is possible to use other number systems, with a different number of digits. Any numbering system based on the same principle (the principle of place-value) must use 2 or more digits.
It depends on which base system you are using. If you use base 10 (the most common one which is used for most math) then any digit from 0 through 9 is acceptable for any given place value. The largest of these digits would be 9. If you are using a different base system then the answer will be different. For example, in base three the numbers 0 through 2 are acceptable for any one place value. The greatest digit in base three for a place value is 2.
The highest digit that can be used in place value is 9. In the base-10 numbering system, which is the most commonly used, digits range from 0 to 9. Each digit's position represents a power of 10, and the highest single-digit value is 9, which is utilized in various combinations to represent larger numbers.
There are two and they are used for 'place value holders'
The hexadecimal system is base 16.
The 'zero' symbol is used as a place value holder,and it can hold any place.
In each place value there are only 10 digits that can be placed, 1,2,3,4,5,6,7,8,9,0. At that point then next place value is used. A different place value system in computers is the based two system. Its number system goes like this 0=0 1=1 10=2 11=3 100=4
Place value is not used in the Roman numeral system.
381 digits.
The ones column are in single digits and if there are none then the 0 digit is used.
Three digits.