Factors and multiples

What is the GCF of 36 and 54?

What is the greatest common factor of 21, 35 and 63?

• 1

• 3

• 7

• 9

What is the GCF of 24 and 40?

• 10

• 8

• 6

• 960

What is the Greatest Common Factor (GCF) of 8 and 10?

• 1

• 3

• 4

• 2

What is the GCF of 20 and 32?

Tony needs to ship 12 comedy DVDs, 24 animated DVDs, and 30 musicals. He can pack only one type of DVD in each box and he must pack the same number of DVDs in each box. What is the greatest number of DVDs Tony can pack in each box?

Do I find the GCF or the LCM?

• GCF

• LCM

The ​ (a)   of 18 and 27 is: 54.

• LCM
• GCF

There are 48 girls and 54 boys in the HCHS band. Ms. Allen plans to arrange the students in equal rows. Only girls or boys will be in each row. What is the GREATEST number of students that could be in each row?

• 6

• 12

• 8

• 4

What is the Greatest Common Factor of 32 and 44?

What is the greatest common factor of 18 and 27?

• 15

• 6

• 9

• 12