Number System Guide Complete guide to number system :- Number and Classification Divisibility and Property Remainder and it's Rules Sum Last Digit Number of Zeroes at the end of the product Binary Number Number and Classification Number system is one of the most important topic for understanding basics of mathematics and quantitative ability. I have noted down some short notes on number system for the competitive exams. Natural Number:- The most familiar numbers are the natural numbers :Example 1, 2, 3, and so on.(except 0) Whole Number:- Natural Number + Zero. Example 0,1,2….. etc Integer:- a number that can be written without a fractional component. Example -1,-2,-3…, 0…,1,2,3 are integers, Rational number:- a number that can be expressed as a fraction . Example 1/7, 8/15 etc. Real number:- It include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers. ...
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