Prime factorization, GCF, and LCM

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

Tags

CCSS.4.OA.B.4

Which list is only composite numbers?

• 1, 3, 4
• 2, 4, 6
• 4, 6, 8
• 5, 6, 8

Tags

CCSS.4.OA.B.4

The number one is

• prime

• composite

• neither prime nor composite

• the loneliest number

Tags

CCSS.4.OA.B.4

What are the prime factors of 30? 

• 3, 2, 5 
• 1, 2, 3, 5, 6, 15, 30
• 3, 30
• 10, 3

Use a number ladder to find the prime factorization of 48

• 4x2x6

• 4x2x2x3

• 3x2x2x2x2

• 12x4

Tags

CCSS.6.EE.A.3

GCF of 99 and 54

• 9
• 3
• 6
• 8

Tags

CCSS.6.NS.B.4

What is the LCM of 3 and 6? 

• 3
• 6
• 12
• 15

Tags

CCSS.4.OA.B.4

What is the least common multiple of 4 and 5?

• 40
• 60
• 1
• 20

Tags

CCSS.4.OA.B.4

What is the GCF and LCM of 12 and 18?

• 6 and 18

• 6 and 36

• 12 and 36

• 3 and 36

Tags

CCSS.6.NS.B.4

What is the GCF and LCM 9 and 15?

• 3 and 15

• 9 and 3

• 45 and 3

• 3 and 45

Tags

CCSS.6.NS.B.4