GCF & LCM Review

What are the first five multiples of 6?

​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• 6
• 12
• 18
• 24
• 30
• 1
• 2
• 3
• 22
• 36

Choose the factors of 18.​

​ (a)   ​ (b)   ​ ​ (c)   ​ (d)   ​ (e)  

• 1
• 2
• 6
• 9
• 3
• 4
• 5
• 8
• 7
• 10

the numbers 2, 3, 5, and 7 are ​ (a)   numbers and the numbers 4, 6, and 8 are ​ (b)   ​​numbers.

• prime
• composite
• rational

What is the prime factorization of 36?

• 2 x 2 x 3 x 3

• 4 x 9

• 6 x 6

• 3 x 12

What is the prime factorization of 42?

42 = ​ (a)   x ​ (b)   x ​ (c)  

• 2
• 3
• 7
• 4
• 5
• 6
• 8

What is the GCF of 8 and 12?

• 4

• 2

• 24

• 6

• 8

What is the GCF of 6 and 15?

Match the following.

• 9

• LCM of 6 & 9

• 18

• LCM of 5 & 7

• 35

• LCM of 3 & 9

• 22

• LCM of 4 & 6

• 12

• LCM of 2 & 11

What is the LCM of 8 and 12?