1-9 excluding six as it is the devils number. Also, seven due to the fact that it would eat nine.
Numerals are symbols used to represent numbers.
Variables
Variables (letters like x and y)
No. The Romans used letters to represent quantities. Whereas the Greeks used letters and symbols to represent quantities.
Numbers and symbols developed as a means of quantifying and communicating information about the world. Early humans used tally marks and simple drawings to represent quantities, leading to more abstract concepts of numbers. Over time, various cultures created numeral systems, such as the Babylonian base-60 system and the Roman numeral system, which evolved into the modern decimal system we use today. Symbols emerged to represent these numbers, facilitating calculations and record-keeping, ultimately leading to the sophisticated mathematical systems we have now.
Numerals are symbols used to represent numbers.
Variables
Symbols used to represent unspecified numbers or values.
A radix is the number of distinct symbols used to represent numbers in a particular base.
Variables (letters like x and y)
The letters of the Greek alphabet, Alpha, Beta, Gamma etc., etc. both upper and lower cases, were used to represent numbers
Numerals are different Numbers as for hieroglyphs are symbols used to represent numbers.
No. The Romans used letters to represent quantities. Whereas the Greeks used letters and symbols to represent quantities.
0 - 9 plus A - F
Operation symbols in mathematics are used to represent mathematical operations, such as addition (+), subtraction (-), multiplication (×), and division (÷). These symbols are used to perform calculations and denote relationships between numbers or variables.
An "R" with two vertical lines instead of just one
Chemical symbols are used to represent elements.