NUMBERS
A number is a mathematical object used to count , measure , and label . The original examples are the natural numbers 1 , 2 , 3 , 4 , and so forth. [1] Numbers can be represented in language with number words . More universally, individual numbers can be represented by symbols , called numerals ; for example, "5" is a numeral that represents the number five . As only a relatively small number of symbols can be memorized, basic numerals are commonly organized in a numeral system , which is an organized way to represent any number. The most common numeral system is the Hindu–Arabic numeral system , which allows for the representation of any number using a combination of ten fundamental numeric symbols, called digits . [2] [3] In addition to their use in counting and measuring, numerals are often used for labels (as with telephone numbers ), for o...