Mastering LCM and GCF

What is the Least Common Multiple (LCM) of 81 and 36?

• 9

• 36

• 324

• 972

Tags

CCSS.6.NS.B.4

Find the Greatest Common Factor (GCF) of 54 and 24.

• 6

• 12

• 18

• 3

Tags

CCSS.6.NS.B.4

Using prime factorization, find the LCM of 14 and 35.

• 70

• 140

• 490

• 245

Tags

CCSS.6.NS.B.4

Using prime factorization, find the GCF of 60 and 48.

• 6

• 12

• 24

• 4

Tags

CCSS.6.NS.B.4

What is the prime factorization of 90?

Tags

CCSS.6.EE.A.1

CCSS.6.EE.A.3

Find the LCM of 20, 30, and 45.

• 180

• 360

• 900

• 120

Tags

CCSS.6.NS.B.4

What is the GCF of 100 and 250?

• 25

• 50

• 100

• 10

Tags

CCSS.6.NS.B.4

Using prime factorization, find the LCM of 21 and 28.

• 84

• 168

• 56

• 42

Tags

CCSS.6.NS.B.4

Using prime factorization, find the GCF of 81 and 108.

• 9

• 27

• 54

• 81

Tags

CCSS.6.NS.B.4

What is the prime factorization of 56?

Tags

CCSS.6.EE.A.1