1. Composite Number

2. Composite Numbers has more than 2 factors
Numbers that are divisible by a number other than 1 and itself are called composite numbers.
Composite Numbers has more than 2 factors
Number
Divisible by
No of factors
6 has more than 2 factors.
So it is a Composite Number 6
1,2,3,6 4
5 has only 2 factors.
So it is not a Composite Number 5
1,5 2
17 has only 2 factors.
So it is not a Composite Number 17
1,17 2
14 has more than 2 factors.
So it is a Composite Number 14
1,2,7,14 4

3. Facts Composite number must be divisible by more than 2 numbers
All composite number can be found by multiplying prime numbers.
Example 4=2x2 , 6=2x3, 8=2 x 2 x 2

4. Try these Find composite numbers between 10 and 20
From the given number below list the composite number
5 , 14 , 17 , 3 , 4 , 9 , 11
21 , 31 , 33 , 17 , 27 , 19 , 15