Prime Factorization

A prime number

• has one factor
• has more than 2 factors
• has 100 factors
• has exactly 2 factors: 1 and the number

Tags

CCSS.4.OA.B.4

All of these are prime except

• 3
• 9
• 2
• 13

Tags

CCSS.4.OA.B.4

A composite number

• has more than 2 factors
• has one factor
• has at least 10 factors
• is always a really big number

Tags

CCSS.4.OA.B.4

2 x 2 x 2 is the prime factorization of

• 6
• 12
• 22
• 8

Tags

CCSS.4.OA.B.4

One is 

• prime
• composite
• not prime or composite
• the loneliest number that you'll ever do

Tags

CCSS.4.OA.B.4

What number is never allowed in a factor tree? 

• 13 (it's bad luck!)
• 1 
• 8675309
• 2

Tags

CCSS.6.EE.A.1

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

Tags

CCSS.4.OA.B.4

Use a number tree to find the prime factorization of 72

• 2x2x2x3x3
• 4x3x3x2
• 4x2x2x2x2

Use a number tree to find the prime factorization of 105

• 7x5x3
• 11x5x3
• 7x5x2x1
• 7x5x3x2