4th Period Arithmetic Factoring Pre-Test

Is 5 prime or composite? 

• Prime
• Composite

Tags

CCSS.4.OA.B.4

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

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

A prime number

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

All of these are prime except

• 3
• 9
• 2
• 13

Tags

CCSS.4.OA.B.4

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

Tags

CCSS.4.OA.B.4

What is the LCM?

• The LCM is the least common factor that both numbers share the least. 
• The LCM is a multiple that both numbers share the most.  
• The LCM is a multiple that both numbers share the least. 
• The LCM is a factor that both numbers share the least. 

What is the LCM of 7 and 8? 

• 7
• 8
• 42
• 56

GCF of 27 and 70

• 3
• 5
• 7
• 10