Notes created by- Mr. Shashank newaskar                             NUMBER SYSTEM 1. Natural Number -All positive counting number’s which start from 1 and goes up to  +∞ (Plus infinity) that number’s are called Natural Number. We represent natural numbers by  “  N  ”            Example-  1,   2,   3,   4,   5   ……………………+∞ 2. Whole number - All positive counting number’s which start from 0 and goes up to  +∞ (Plus infinity) that number’s are called Whole Number. We represent Whole numbers by  “  W  ”     Example-  0,   1,   2,   3,   4,   5   ……………………+∞ 3. Integer number - Those number’s which start from -∞(Minus infinity) and goes up to  +∞ (Plus infinity) that number’s are called Integer Numbers. ...