Average Average means a number which expressing the central or typical value of the given data. The average of some numbers or some quantities is the sum of quantities divided by the number of quantity. Average = [latex]\frac{sum of observation}{number of observation}[/latex] Suppose Read More …

# Author: abhishek

## Simple interest and Compound interest

Simple interest and Compound interest Simple interest is calculated on the principal or amount of loan, whereas compound interest is calculated on principal as well as on the interest of previous years. Principal(P): The sum of money lent, borrowed or invested Read More …

## Boat and Stream

Boat And Stream Downstream: In water, the direction along the stream is called downstream. Upstream: In water, the direction against the stream is called upstream. Speed of boat is always greater than the speed of water If the speed of Read More …

## Time and Distance

Time and Distance Time and distance problems will be worked out using the distance, speed and time equation which are the three basic formulas in this chapter. Speed : speed is the distance covered by an object per unit time. Distance: The Read More …

## Time and Work

Time and Work In time and work problems we will learn how to find the time required to complete a piece of work and also work done in a given period of time If a man A can do a piece Read More …

## Profit And Loss

Profit And Loss When we buy and sell something, then either we will be in profit or we will be in loss. This profit and loss depends on the cost price and selling price of the article. COST PRICE: Read More …

## Mensuration

Mensuration Mensuration is the branch of mathematics which deals with areas and perimeter of 2- dimensional figure and volumes and surface area of 3- dimensional figure. 2 – Dimensional shapes: A Shape that has only two dimensions ( generally length Read More …

## Percentage

Percentage Percentage means per hundred or out of hundred. we can also say that percentage is a fraction whose denominator is 100. For example: 35% = 35/100 Suppose a student scores 280 marks out of 400 in his class So Read More …

## Area of Congruent figures

Area of Congruent figures Two figures are congruent if they are of same size and same shape i.e. their all sides are equal and corresponding angles are equal. For example [latex]\triangle ABC[/latex] [latex]\cong[/latex] [latex]\triangle DEF[/latex] Quadrilateral ABCD [latex]\cong[/latex] Quadrilateral EFGH Areas of Read More …

## Algebra

Algebra Algebra is the branch of mathematics which deals with the unknown and constants. Variables: It is a symbol for a number which we don’t know i.e. its value is not fixed. It is usually denoted by English alpha bates as Read More …