In various types of numbers we will learn about even numbers, odd numbers, prime numbers, composite numbers, coprime numbers and twin prime numbers along with the example:
Even Numbers
A whole number exactly divisible by 2 is called even numbers.
For example:
2, 4, 6, 8, 10, 12, 14, 16..........................are even number. Or a number having 0, 2, 4, 6, 8 at its units place is called an even number.
246, 1894, 5468, 100 are even number.
Any two even numbers which differ from one another by 2 are called consecutive even number.
Odd Numbers
A whole number which is not exactly divisible by 2 is called an odd number.
For example:
3, 5, 7, 9, 11, 13, 15, are odd number.
Or a number having 1, 3, 5, 7 and 9 at its units place is called an odd number.
Prime Numbers
Number s which have only two factors namely 1 and the number itself are called prime numbers.
For example:
2, 3, 5, 7, 11, 19, 37 etc are prime numbers.
Composite Numbers
Numbers having more than two factors are called as composite numbers.
For example:
4, 6, 8, 10 etc are composite numbers.
Notes:
(a) 1 is neither prime nor composite.
(b) 2 is the lowest and the only even prime number.
(c) 9 is the lowest odd composite number.
Coprime Numbers
Two numbers are said to be coprime if they do not have a common factor other than 1 or two numbers whose HCF is 1 called coprime numbers.
Coprime numbers needs not be prime numbers.
For example:
(i) 7 and 10 are coprime.
(ii) 15 and 17 are coprime.
Twin Prime Numbers
Twin prime numbers are the two prime numbers whose difference is 2.
For example:
(i) 3 and 5
(ii) 17 and 19
(iii) 41 and 43
(iv) 29 and 31
(v) 71 and 73.
5th Grade Math Problems
From Various Types of Numbers to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.