Factors and Multiples

Composite Numbers

Prime Numbers

A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.Example 2, 3, 5, 7, 11, 13, 17 etc

Is 1 a Prime Number?

Factors and Multiples

Factors and Multiples

Numbers that can be written as a product of two or more prime numbers.Example: 4, 6, 8, 9, 10, 12, 14, 15 etc

Is 1 a composite number?

2 X 3 = 62 and 3 are factors of 6 6 is a multiple of 2 and 3

6 x 2 = 123 x 2 x 2 = 123 and 2 are prime factors of 12.6 is a factor of 12 but it is not a prime factor.

Prime Factors

Factors

List all the factors of 121 X 122 X 63 X 4The factors of 12 are 1, 2, 3, 4, 6 and 12

Square ' Square RootCube ' Cube Root

Note

Note

Prime Factors

A composite number can always be written as a product of its prime factors96 = 2 X 2 X 2 X 2 X 2 X 3 = 2 X 3

5

2 x 2 = 2 = 4

4 = 2

2

2 x 2 x 2 = 2 = 8 = 2

8

2 X 3 X 2 X 3 X 2 X 3 = (2 x 3) x (2 x 3) x (2 x 3)= (2 x 3)

2 x 2 x 2 x 3 x 3 x 3= 2 x 3=(2 x 3)

3

3

3

3

2

3

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