Multiples, Factors, Prime & Composite

Multiples of...

100

Write the first 5 multiples of 11.

11, 22, 33, 44, 55

200

Write the first 5 multiples of 7.

7, 14, 21, 28, 35

300

Write the first 5 multiples of 12. 

12, 24, 36, 48, 60

400

Find the common multiples of 3 and 4 up to 20.

12 

500

Find the common multiples of 4 and 6 up to 30.

12 and 24

Factoring

100

What are the factors of 3?

1 x 3

200

What are the factors of 12?

1 x 12

2 x 6

3 x 4

300

What are the factors of 9?

1 x 3

3 x 3

400

What are the factors of 49?

1 x 49

7 x 7

500

What are the factors of 36?

1 x 36

2 x 18

3 x 13

4 x 9

6 x 6 

What are prime numbers?

100

Is 4 a prime number?

Composite.

1 x 4

2 x 2

200

Is 9 a prime number?

Composite.

1 x 9

3 x 3

300

Is 13 a prime number?

Prime.

1 x 9

400

Is 21 a prime number?

Composite.

1 x 9

3 x 7

500

Is 99 a prime number?

Composite.

1 x 99

3 x 33

What are composite numbers?

100

Is 8 a composite number?

Composite!

1 x 8

2 x 4

200

Is 15 a composite number?

Composite!

1 x 15

3 x 5

300

Is 7 composite?

Prime!

1 x 7

400

Is 87 composite?

Composite!

1 x 87

3 x 29

500

Is 2 composite?

Prime!

1 x 2

True or False

100

1 and 17 are the only factors of 17.

True!

200

1 is a prime number.

False! 

1 is not prime or composite!

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

11 is a prime number.

True!

1 x 11

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.