Learn Numbers Online for Kids

Introduction to learn numbers online for kids:

When we search online for learn about numbers we have getting the following topics. These topics are helping us to understand the basic number systems and some interesting schemes and practices on numbers. There are many kinds of numbers in mathematics. Normally numbers are the back bone of mathematics. Let us see about Learn numbers online for kids. I like to share this Perfect Square Numbers with you all through my article.


Learn numbers online for kids:


Learn numbers online for kids – square numbers:

In the division of arithmetic the square numbers are expression to be as the numbers that are shaped as the product value when the similar numbers got multiply twice as r * r = p, where ‘p’ is said to be as the square digit and ‘r’ is said to be as square root of ‘p’.
Illustration of square numbers is1, 4, 9, 16, 25……
Learn numbers online for kids – cube numbers:

In the division of arithmetic the cube numbers are expression to be as the numbers that are created as the product value when the similar numbers got multiplied thrice as r * r * r = p, where ‘p’ is said to be as the cube number and ‘r’ is said to be as cube root of ‘p’.
The examples for cube integers are 1, 8, 27, 64……


Please express your views of this topic cbse books for class 11 by commenting on blog.

Some more details about learn numbers online for kids:


Learn numbers online for kids – triangular numbers:

In the division of arithmetic the triangular numbers are expression to be as the numbers that are created as the added value when the consecutive numbers are added to the resulted number as r,  (r+2) = p, (p+3) = q, (q+4) = s…..
Example for triangular numbers is 1, 3, 6, 10, 15, 21, 28, 36, 45……….
Learn numbers online for kids – prime numbers:

In the division of arithmetic the prime numbers are expression to be as the numbers that are said to have only two factors as they get divisible by the multiplication table ‘1’ and its similar number multiplication table.
Example for prime numbers is 2, 3, 5, 7, 11, 13, 17, 19…….

Negative Prime Numbers

Introduction :

Let us study about the negative prime numbers. The prime numbers are commonly termed to be as the numbers which gets divisible by ‘1’ multiplication table and its own multiplication table alone.
Therefore the prime numbers are said to have only two factors. The negative prime numbers are said to be as the normal prime numbers along with the negative sign.
Some of the examples for negative prime numbers are discussed in detail as below.


Negative Prime Numbers:

Negative prime numbers example 1:

From the following series of numbers, find the numbers that belongs to negative prime numbers ones?
1, -2, 7, -5, -7,-9, -21


Solution:

The number in the first position is ‘1’ which is not a prime number since the numbers greater than ‘1’ is considerable in the prime numbers family and also it is not with the negative sign for the negative prime numbers category.
The number in the second position is ‘-2’ which is said to be an even prime number. Since it is with the negative sign it is a negative prime number.
The number in the third position is ‘7’ which is said to be a prime number but it is not a negative prime number since there is no negative sign in it.
The number in the fourth position is ‘-5’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.
The number in the fifth position is ‘-7’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.
The number in the sixth position is ‘-9’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.
The number in the seventh position is ‘-21’ which is said to be a non prime number. Since it is with the negative sign it is a negative non prime number.


Negative prime numbers example 2:

From the following series of numbers, find the numbers that belongs to negative prime numbers ones?
2, -3, 5, -9, 13, -17, -27

Solution:

The number in the first position is ‘2’ which is said to be an even prime number but it is not a negative prime number since there is no negative sign in it.
The number in the second position is ‘-3’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.
The number in the third position is ‘5’ which is said to be a prime number but it is not a negative prime number since there is no negative sign in it.
The number in the fourth position is ‘-9’ which is said to be a non prime number. Since it is with the negative sign it is a negative non prime number.
The number in the fifth position is ‘13’ which is said to be a prime number but it is not a negative prime number since there is no negative sign in it.
The number in the sixth position is ‘-17’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.
The number in the seventh position is ‘-27’ which is said to be a prime number. Since it is with the negative sign it is a negative prime number.


Negative prime numbers exercises:

From the following series of numbers find the numbers that belongs to negative prime numbers ones?
-17, 19, -29, 31, 41, -43, 58. (Answer: -17, -29 and -43)

From the following series of numbers find the numbers that belongs to negative prime numbers ones?
-2, 5, -101, 102, -107, 109, 131. (Answer: -2, -101 and -107)

How to find Prime numbers

Introduction to prime numbers : let us first understand What is prime number in math ?A natural number greater than 1, which has no factors except 1 and itself is called a prime number.Example of prime numbers are: 2, 3, 5, 7, 11, 13, 17,…. and so on.what about 1 . Is the Number 1 a Prime Number? so , no 1 is not a prime number because 1 is neither prime nor composite. Every natural number except 1 is, either a prime number or a composite number.and now let us see Is Two a Prime Number?yes  2 is the only prime number which is even. All other prime numbers are odd.Let us now understand the concept of finding prime numbers.

How to find prime number?Eratosthenes, a Greek mathematician, gave a simple method to mark out primes. His method is known as the Sieve of Eratosthenes.We first list the numbers up to 100, except 1 which is neither prime nor composite.
1. Begin with 2 which is prime. So keep it but cross out all its multiples.
2. Next, the number is 3 is prime. Thus we keep it but cross out all its multiples. Some of these numbers have already been crossed out.
3. The next number not crossed out is 5. It is also prime. So, keep it and cross out all its multiples.
4. Continue this process keeping only the primes and striking off their multiples until we cannot strike off any more numbers.

Thus, the prime numbers from 1 to 100 are:2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.Eratosthenes, probably, made holes in the paper instead of crossing out the numbers. Therefore, his paper must have looked like a sieve. That is why perhaps this method is known as sieve method.

From the above set of primes between 1 and 100, we do not see any pattern. We will not see any regular pattern even if we take numbers between 1 and 10000. Mathematicians from ages tried unsuccessfully to find a simple formula which will give all the prime numbers and only the prime numbers. It is now known that no simple formula exists, so the only way to find whether the given number is prime is to see if it has any factor other than 1 and itself.now let us know What is the largest known prime number? The largest known prime number is 243112609 - 1, It is the largest integer that is currently known to be a prime number.