Factors & Multiples

Finding Factors

100

What are the factors of 4?

1, 2, 4,

200

What are the factors of 12?

1, 2, 3, 4, 6, 12

300

What are the factors of 35?

1, 5, 7, 35

400

What are the factors of 78?

1, 2, 3, 6, 13, 26, 39, 78

500

What are the factors of 100?

1, 2, 4, 5, 10, 20, 25, 50, 100

Multiples Madness

100

List the first FIVE multiples of the number 2.

2, 4, 6, 8, 10

200

List the first FOUR multiples of the number 12.

12, 24 36, 48

300

List the first SIX multiples of the number 11.

11, 22, 33, 44, 55, 66 

400

Fill in the missing multiple:

3, 6, 9, ________, 15, ________, 21, _________

12,   18,   24

500

Fill in the missing multiples.

7, 14, ______,  ______, 35, ______

21, 28, 42

What are Prime Numbers?

100

Is 2 a PRIME NUMBER?

YES or NO

YES- The only way to make a 2 with multiplication is by doing 1x 2.

200

Is 4 a PRIME NUMBER?

YES or NO

NO!  

You can make 4 by doing 1 x 4 and 2 x 2.

300

Is 13 a PRIME NUMBER?

YES or NO

YES-  the only way to make 13 with multiplication is by doing 1 x 13.

400

Is 19 a PRIME NUMBER?  

YES or NO

YES!  The only way to make 19 with multiplication is by doing 1 x 19.

500

Is 89 a PRIME NUMBER?

YES!  The only way to make 89 using multiplication os by doing 1 x 89.

Discovering Common Factors

100

What are the common factors of 3 and 6?

Factors of 3:______________________

Factors of 6:______________________

1 and 3

200

What are the common factors of 4 and 8?

Factors of 4:______________________

Factors of 8:______________________

1, 2, 4

300

What are the common factors of 10 and 25?

Factors of 10:______________________

Factors of 25:______________________

1, 5

400

TRUE or FALSE?

 1, 2, 3, 4, 6, 12 the common factors of 12 and 24.

Factors of 12:______________________

Factors of 24:______________________

TRUE!

500

TRUE or FALSE?

1, 3, 9 are the common factors of 9 and 36.

TRUE!

Common Mighty Multiples

100

What are TWO common multiples of 2 and 4?

Multiples of 2:  2, 4, 6, 8, 10...

Multiples of 4:  4, 8, 12, 16...

4 and 8

200

What are the first TWO common multiples of 5 and 10.

5:  5, 10, 15, 20, 25....

10:  10, 20, 30, 40...

10 and 20

300

What are TWO common multiples of 3 and 5?

3:  3, 6, 9, 12 15, 18, 21 24, 27, 30...

5:   5, 10, 15, 20, 25, 30...

15, 30

400

TRUE or FALSE?

Is 9 a common multiple of 3 and 4?

3:  3, 6, 9, 12, 15, 18, 21

4:  4, 8, 12, 16, 20

NO!  It is NOT on BOTH lists!

500

Is 24 a common multiple of 8 and 12?

8:  8, 16, 24, 32...

12: 12, 24, 36...

YES!  24 is on both lists!