GCF/LCM Review

A prime number

• has one factor

• has more than 2 factors

• has 100 factors

• has exactly 2 factors: 1 and itself

Which of these numbers is NOT prime?

• 17

• 25

• 23

• 37

Name the next 3 prime numbers after 23.

• 24, 25, 26
• 29, 30, 31
• 29, 31, 37
• 24, 26, 28

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

Which of the following numbers is NOT composite?

• 24

• 40

• 66

• 61

Name the 5th prime number.

• 2
• 11
• 5
• 7

What is the GCF of 8 and 20?

• 8

• 2

• 4

• 10

Tags

CCSS.6.NS.B.4

What is the GCF of 7 and 12?

• 2

• 7

• 1

• 84

Tags

CCSS.6.NS.B.4

Find the Greatest Common Factor (GCF) OF 24 and 40.

• 1

• 120

• 16

• 8

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