Greatest Common Factors Workbook
Odd numbers : The numbers ending with 1,3,5,7 or 9 are known as odd numbers.
Even numbers : the numbers ending with 2,4,6,8 or 0 are known as even numbers.
Prime and composite numbers
Prime Number:
Let ‘p’ be a natural number ‘p’ is said to be prime if it has exactly two distinct factors, namely 1 and itself.
e.g., 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, …..
There are 25 prime numbers between 1 and 100. These 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.
Composite Number:
Let ‘a’ be a natural number, ‘a’ is said to be composite if, it has atleast three distinct factors.
Note:
(i) ‘1’ is neither prime nor composite.
(ii) ‘2’ is the only even prime number.
(iii) Number which are not prime are composite numbers (except 1).
(iv) ‘4’ is the smallest composite number.
Click here to view the Full Book