olemus
kirjamärk arvude esituseks

Wiktionary:
2. (mathematics) a distinct symbol representing one of an arithmetic progression of numbers between 0 and the radix
Hexadecimal numeration (Base sixteen) includes the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 but also A (=10 decimal), B, C, D, E, and F. Sixteen itself is written as the two-digit number 10.

näiteid
- 0, 1, 2,...
- A, B, C, D, E, F
- I, V, X, C, D, M

ülevaateid
https://en.wikipedia.org/wiki/Numerical_digit

vt ka
- number (2)
- number (3)