Answer: numerals

AnswerCrossword Clue
NUMERALS

X and V, to Romans

NUMERALS

Mathematical symbols

NUMERALS

1, 2, 3, etc.

NUMERALS
Area codes, zip codes, etc.
NUMERALS
M, V, L, etc., to a Roman
NUMERALSArabic characters
NUMERALSMathematical figures