GCF LCM

Use a factor tree to find prime factorization of 24.

• 2 x 3 x 2 x 3

• 2 x 3 x 2 x 2

• 6 x 2 x 2

• 2 x 3 x 4

Express 96 as a product of prime factors.

• 2 x 2 x 2 x 2 x 2 x 3

• 2 x 3 x 4 x 4

• 2 x 2 x 2 x 2 x 6

51 is a _____________ of 3

• Factor 
• Multiple

Which of the choices is a factor of 10?

• 2
• 4
• 6
• 8

Tags

CCSS.4.OA.B.4

Which choice shows a multiple of 8?

• 8
• 4
• 2
• 1

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 GCF of 18 and 24?

• 3
• 6
• 8
• 9

Find the LCM of 12 and 6. 

• 6
• 12
• 2
• 1

What is the GCF of 7 and 18?

• 7
• 18
• 1
• 3

What is the least common multiple (LCM) of 4 and 10?

• 4
• 40
• 15
• 20