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# Lesson 2 — Activity 3: Composites and Prime Factorizations

Completion requirements

# Lesson 2 — Activity 3: Composites and Prime Factorizations

#### Getting Ready

#### In the previous two activities, you have practised
finding multiples and factors. Take a moment to think once more what
each of these are.

#### For the number 6:

The first five multiples of 6 are:

- 6 x 1 = 6

- 6 x 2 = 12

- 6 x 3 = 18

- 6 x 4 = 24

- 6 x 5 = 30

- 6: {6, 12, 18, 24, 30}

Image courtesy of www.imagesgoogle.com

#### The factors of 6 are:

- 6 ÷ 1 = 6

- 6 ÷ 2 = 3

- 6 ÷ 3 = 2

- 6: {1, 2, 3, 6}

#### Getting Ready

#### In the previous two activities, you have practised finding multiples and factors. Take a moment to think once more what each of these are.

#### For the number 6:

The first five multiples of 6 are:

- 6 x 1 = 6

- 6 x 2 = 12

- 6 x 3 = 18

- 6 x 4 = 24

- 6 x 5 = 30

- 6: {6, 12, 18, 24, 30}

Image courtesy of www.imagesgoogle.com

#### The factors of 6 are:

- 6 ÷ 1 = 6

- 6 ÷ 2 = 3

- 6 ÷ 3 = 2

- 6: {1, 2, 3, 6}

#### In this activity, you will learn about the types of numbers.

There are two types of numbers:

**Prime numbers**:

- A
prime number is a number that can only be divided by itself and 1.
Another way to think of prime numbers is that they only have 2 factors. O
and 1 are not prime numbers.

- The first five prime numbers are 2, 3, 5, 7, and 11.

**Composite numbers**:

- A composite number is a number that can be divided by more than itself and 1 (meaning they have more than two factors).

- 4 is the first composite number because it can be divided by 1, 2, and 4