Gcf and Lcm Practice

What is the GCF of 8 and 24?

• 1

• 24

• 8

• 4

What does GCF mean?

• Great Cookie Fever

• Greatest Common Factor

• Greatest Common Multiple

• Greatest Compared Factor

How do you find the multiples of a number?

• Use division to find out what you multiply to make a multiple.

• Use my multiplication facts and write them out.

• Write down how many times that number appears in a multiplication table/chart.

What are the first 5 multiples of 16?

• 1, 2, 4, 8, 16

• 16, 32, 48, 64, 80

• 16, 22, 38, 44, 50

• 1, 2, 3, 4, 5

What is the greatest common factor of 24 and 36?

• 2

• 3

• 12

• 24

What is the LCM of 15 and 10?

• 15

• 25

• 30

• 20

What is the LCM of 6 and 24? 

• 3
• 6
• 12
• 24

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1
• 2
• 7
• 14

Prime numbers have _____ factors.

• no
• 3
• 1
• 2

What number is the only even prime number?

• 0
• 2
• 1
• 3