Assertion: hex | /r/CapableOf | use letter
Facets:
value: to represent the numbers
type: PURPOSE
Source sentences:
text: Hex uses 16 digits including 0-9, just as the decimal system does, but also uses the letters A, B, C, D, E, and F (equivalent to a, b, c, d, e, f) to represent the numbers 10-15.