GCF, LCM, Prime Factorization

What is the least common multiple (LCM) of 2 and 3?

• 6
• 8
• 20
• 10

Tags

CCSS.6.NS.B.4

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

• 4
• 40
• 15
• 20

Tags

CCSS.6.NS.B.4

What is the least common multiple (LCM) of 2 and 24?

• 24
• 2
• 12
• 48

Tags

CCSS.6.NS.B.4

What is the greatest common factor (GCF) of 18 and 24?

• 3

• 6

• 8

• 9

Tags

CCSS.6.NS.B.4

What is the greatest common factor (GCF) of 4 and 12?

• 3

• 1

• 6

• 4

Tags

CCSS.6.NS.B.4

What is the greatest common factor (GCF) of 20 and 30?

• 5

• 2

• 10

• 20

Tags

CCSS.6.NS.B.4

Which is the prime factorization of 12? 

• 2 x 6
• 2 + 2 + 2 + 2 + 2 + 2 
• 2 x 2 x 3
• 1 x 2 x 2 x 3

What is the prime factorization of 16? 

• 1 x 16
• 2 x 2 x 4
• 2 x 2 x 2 x 2
• 8 + 8

Use a number tree to find the prime factorization of 48

• 4x2x6
• 4x2x2x3
• 3x2x2x2x2
• 12x4

Use a number tree to find the prime factorization of 72

• 2x2x2x3x3

• 4x3x3x2

• 4x2x2x2x2

• 3x3x3x3x3