GCF & LCM

What does GCF mean?

• Great Cookie Fever

• Greatest Compared Factor

• Greatest Common Multiple

• Greatest Common Factor

Is 3 a factor of 12?

• yes
• no

Which number is NOT divisible by 2?

• 450
• 35
• 1,328
• 96

All even numbers have _____ as a factor.

• 3
• 5
• 2
• 4

What is the divisibility rule for 3?

• Add up the digits. The sum must be an even number

• The digits must add up to 9.

• The last digit must be a 3.

• Add up the digits. The sum of the digits must be divisible by 3.

What is the divisibility rule for 5?

• The digits must add up to 10.
• The last digit needs to be a 5 or 0.
• The last digit can only be a 5.
• The sum of the digits need to be divisible by 5.

What are all of the factors of 12?

• 1 and 12

• 1, 2, 3, 4, & 6

• 1, 2, 3, 4, 6, & 12

• 1, 2, 3, 4, 6, 10, & 12

• 12, 24, 36, 48, 72 , 84...

Name the factors of 27.

• 1, 3, 9, 27
• 3, 9
• 1, 27
• 1, 2, 3, 27

Which lists all the factors of 15?

• 1, 7, 8, 15
• 1, 15
• 1, 3, 5, 15
• 3, 5, 15

What is the Greatest Common Factor of 12 and 18?

• 1

• 3

• 6

• 8