Finding Factors

Find all factor pairs for 62.

• 1 and 62

• 2 and 30

• 2 and 31

• 3 and 19

• 4 and 15

Tags

CCSS.6.NS.B.2

Find all the factor pairs for 71.

• None.

• 1 and 71

• 2 and 35

• 1 and 70

• 2 and 20

Which are factors of 10?

• 1

• 2

• 3

• 4

• 5

Tags

CCSS.3.OA.B.6

Write the factors of the number 20.

• 1, 2, 4, 5, 10, 20

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20

• 1, 2, 10, 20

• 2, 10, 4, 5

What are the factors of 31?

• None.

• 20, 11

• 30, 1

• 1, 31

Tags

CCSS.4.OA.B.4

Write the factors of the number 28.

• 1 and 28

  2 and 14

• 1 and 28

  2 and 14

  3 and 9

  4 and 7

• 1 and 28

  2 and 14

  4 and 7

• 8 and 20

Tags

CCSS.4.OA.B.4

Write the factors for the number 18.

• 1 and 18

  2 and 9

  3 and 6

  4 and 4

• 1 and 18

  2 and 9

  3 and 6

• 1 and 17

  2 and 16

• 2 and 9

  3 and 6

Any number that has 9 as a factor also has 3 as a factor. Why is this?

• If 9 is a factor, then so is 3, because 3 is a factor of 9.

• If 3 is a factor, then so is 9, because 9 is a factor of 3.

• This is because 9 and 3 are multiples of each other. If two numbers can be written as multiples of each other, then they are factors of the same numbers.

• This is because 3 is a prime number, making it a factor of any other number.