Greatest Common Factor Using Factor Tree

This is the greatest whole number that is a factor of two whole numbers. Or, the highest number that divides exactly into two or more numbers.

• Greatest Common Factor

• Least Common Multiple

• Multiplicative Inverses

• Algorithm

Adam is trying to find the greatest number of gift bags he can give to his friends. He wants the same amount of toy dinosaurs and stickers in each bag. If he has 30 toy dinosaurs and 20 stickers, what does he need to find? How many dinosaurs and stickers will be in each bag?

• Greatest Common Multiple; 3 dinosaurs and 2 stickers

• Greatest Common Factor; 3 dinosaurs and 2 stickers

• Greatest Common Factor; 6 dinosaurs and 4 stickers

• Least Common Multiple; 60 dinosaurs and 60 stickers

Using the prime factorization trees, what is the GCF of 24 and 40?

• 17

• 12

• 4

• 8

To break down 2 numbers using prime factorization trees and find what they have in common is ...

What is the GCF?

• 2

• 3

• 9

• 18

• A

• B

• C

• D

What is the GCF?

• 8

• 3

• 2

• 4

What is the GCF of 12 and 10 (prime factorization tree)?

• 10

• 2

• 6

• 5

What is the GCF (tree) of 35 and 42?

What is the missing factor?

• 1

• 2

• 5

• 8