Factoring Common Factors

What are the common factors of 12 and 18?

• 15, 16, 17, 19

• 10, 11, 13, 14

• 4, 5, 7, 9

• 1, 2, 3, 6

Answer explanation

The common factors of 12 and 18 are 1, 2, 3, and 6. These numbers divide both 12 and 18 without leaving a remainder.

What are the common factors of 15 and 25?

• 1, 3, 5

• 2, 5

• 1, 5

• 3, 5

Answer explanation

The common factors of 15 and 25 are 1 and 5. The correct choice is 1, 5.

What are the common factors of 28 and 42?

• 4, 8, 16, 32

• 3, 6, 9, 12

• 1, 2, 7, 14

• 5, 10, 15, 20

Answer explanation

The common factors of 28 and 42 are 1, 2, 7, and 14.

Find the common factors of 30 and 45.

• 1, 2, 3, 5, 10, 15

• 1, 3, 5, 15

• 1, 2, 3, 4, 5

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Answer explanation

The common factors of 30 and 45 are 1, 3, 5, and 15. These numbers can divide both 30 and 45 without leaving a remainder.

Tags

CCSS.4.OA.B.4

What are the common factors of 20 and 30?

• 1, 2, 5, 10

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 1, 2, 3, 5

• 1, 2, 3, 4, 5, 6

Answer explanation

The common factors of 20 and 30 are 1, 2, 5, and 10. These numbers can divide both 20 and 30 without leaving a remainder.

What are the common factors of 16 and 24?

• 1, 2, 4, 8

• 1, 2, 3, 4, 6

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 1, 2, 3, 5, 7, 11

Tags

CCSS.4.OA.B.4

Find the common factors of 35 and 45.

• 1, 5

• 1, 3, 5, 15

• 1, 2, 3, 4, 5

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Tags

CCSS.4.OA.B.4

List all the factors of 12

• 1, 2, 3, 4, 6, 12

• 1, 2, 4, 12

• 1, 12

• 1, 2, 3, 4, 5, 6, 12

Tags

CCSS.4.OA.B.4

What are the factors of 25?

• 1, 2, 3, 5, 10, 15, 25

• 1, 5,  25

• 1, 25

• 1, 5

Tags

CCSS.4.OA.B.4

What is the greatest common factor of the monomials a²b⁵ and a³b³

• a²b³

• a²b⁵

• a³b³

• a³b⁵