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Numbers and number systems

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In this post let us clearly know about the classification of the number system.before classifying numbers let us know about numbers and number systems.  what is a number? =>A number can be defined as a group of digits which have some value. what is a number system? =>The systematic way in which numbers are organized
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mixtures and alligations problems

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Alligation rule is used to determine the exact proportion to mix two ingredients of any price to obtain a mixture with estimated cost. Mean price: Cost price of the mixture per unit. suppose a container contains x units of liquid out of which y units are replaced then quantity of liquid after n such operations left in container would be x(1-y/x)^n  Alligation rule: Quantity of cheap ingredient(b) : Quantity of costly ingredient (a)= x2-x1 : x1-x0 point to remember: cost price of mixture always lies between two costs. Consider the graph Quantity v/s Cost , with this method one can solve problems with more ease A: Type of cheaper ingredient. B: Type of costly ingredient. x0: cost of cheaper ingredient. x1: cost of mixture. x2: cost of costly ingredient. Quantity of cheap ingredient : Quantity of costly ingredient = x2-x1 : x1-x0
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Profit loss and discount problems

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One of the important roles of an organization is to ensure the overall performance based on profit as it is the only factor for organization's sustainability.so profit and loss problems have a great role in quantative aptitude. In general,profit can be defined as the financial gain and loss can be defined as the amount lost. There are few more terms which one should learn  Cost Price(C.P): Amount incurred for purchasing/manufacturing the product. Selling Price(S.P): Gained amount in process of selling the product.
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