Lcm, Gcf, and prime factorization

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Find the prime number.

• 10
• 9
• 7
• 4

Tags

CCSS.4.OA.B.4

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

One is

• prime

• composite

• not prime or composite

• the loneliest number

What are the prime factors of 30? 

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

Use a number tree to find the prime factorization of 48

• 4x2x6
• 4x2x2x3
• 3x2x2x2x2
• 12x4

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.6.NS.B.4

Which list of numbers contains only common multiples of 4 and 12?

• 12, 16, 20, 24, 28
• 12, 24, 36, 48, 60
• 4, 8, 12, 16, 20
• 8, 12, 16, 20, 24

Tags

CCSS.6.NS.B.4