News & Updates

Magic of Numbers  Magical 1 3 x 37 = 111 33 x 3367 = 111,111 333 x 333667 = 111,111,111 3333 x 33336667= 111,111,111,111 33333 x 3333366667= 111,111,111,111,111 333333 x 333333666667 = 111,111,111,111,111,111 Consider the L.H.S of the above numbers. The number of 3s...

Unit digit of Perfect Squares Properties regarding Unit Digit of Perfect Square Squares: There is a definite relationship between the unit digits when square of a number is considered, we will see that one by one. - If unit digit of a perfect square is 1 then ten's...

Tricks with numbers Number of times a particular digit (except 0) appears in a certain range: The concept, the title of the post talks about, is best understood with the help of examples. This is our way of practical learning and using problem types to understand...

Properties of Addition of Natural Numbers: Sum of 1st 'n' Natural numbers =  1 + 2 + 3 + .... + n = $\frac{n\left( n+1 \right)}{2}$ Sum of squares of 1st 'n' natural number  =  12 + 22 + 32 + ..... + n2  = $\frac{n\left( n+1 \right)\left( 2n+1 \right)}{6}$ Sum of...

Prime Numbers and Composite Numbers How to check whether a number is prime or not? To check whether a given number N is prime or not, first find the square root of that number N and then approximate that to immediately lower integer (say n) and write down all the...

Prime numbers  Numbers, which don’t have any factor other than 1 or itself, are said to be prime numbers. For example 2, 3, 5, 7, 19, 29, 31.................. Or we can say that the numbers which are not divisible by any other number except 1 and itself, are called...

Properties of Numbers The following is a handy list of tips that you can remember about numbers (think about each one of these): The number line goes on till infinity in both directions, which is indicated by the arrows. The numbers on the number line are indicated by...

Types of Numbers: Part-2 Integers: It is combination of both positive and negative numbers lying on the number line including zero. Remember zero is an integer. The integers are the natural numbers, their negatives, and the number zero like ...,-3,-2,-1,0,1,2,3,......

Types of Numbers: Part-1 In this first article of our topic ‘Numbers’, we deal with ‘Numbers’ themselves. What are numbers? Where do we see and meet them? Are they of different types? Can we learn these distinct types of numbers? Well, numbers are all around us,...