Multiples of...
Factor Rainbows
What are prime numbers?
What are composite numbers?
True or False
100

4, 6, 8 , 10

Multiples of 2

100
What are the factors of 3?
1 x 3
100

Is 4 a prime number?

Composite.

1 x 4

2 x 2

100

Is 8 a composite number?

Composite!


1 x 8

2 x 4

100

1 and 17 are the only factors of 17.

True!

200

50, 55, 60, 65, 70

Multiples of 5

200

What are the factors of 12?

1 x 12

2 x 6

3 x 4

200

Is 9 a prime number?

Composite.

1 x 9

3 x 3

200

Is 15 a composite number?

Composite!

1 x 15

3 x 5

200

1 is a prime number.

False! 

1 is not prime or composite!

300

16, 24, 32, 40

Multiples of 8

300

What are the factors of 9?

1 x 3

3 x 3

300

Is 13 a prime number?

Prime.

1 x 9

300

Is 7 composite?

Prime!

1 x 7

300

(2 and 6) and (4 and 12) are the only factor pairs for 12.

False!

1 x 12

2 x 6

3 x 4

400

21, 28, 35, 42

Multiples of 7

400

What are the factors of 49?

1 x 49

7 x 7

400

Is 21 a prime number?

Composite.

1 x 9

3 x 7

400
Is 87 composite?

Composite!

1 x 87

3 x 29

400

11 is a prime number.

True!

1 x 11

500

24, 36, 48, 60

Multiples of 12

500

What are the factors of 36?

1 x 36

2 x 18

3 x 13

4 x 9

6 x 6 

500

Is 99 a prime number?

Composite.

1 x 99

3 x 33

500

Is 2 composite?

Prime!


1 x 2

500

2 is a composite number!

FALSE!!

Two is the only even number that is PRIME!  It only has one factor pair - 1 x 2.

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