Finding the GCF with Prime Factorization

The video tutorial from Tutoring Hour explains how to find the Greatest Common Factor (GCF) using prime factorization. It covers the concept of GCF, also known as HCF or GCD, and demonstrates the process with examples, including the numbers 18 and 27, and a real-life application involving distributing items evenly into goody bags. The tutorial also explores finding the GCF of three numbers, 42, 56, and 98, and discusses co-prime numbers. The video concludes with a call to action for viewers to engage with the content and subscribe for more learning resources.

What does GCF stand for?

• Greatest Common Function

• Greatest Common Formula

• Greatest Common Fraction

• Greatest Common Factor

What are the prime factors of 18?

• 2, 3, 3

• 2, 2, 3

• 3, 3, 3

• 2, 2, 2

What is the GCF of 18 and 27?

• 3

• 6

• 12

• 9

How many goody bags can Irene make with 24 brushes and 36 paint bottles?

• 10

• 6

• 8

• 12

How many paint bottles will go into each goody bag if Irene makes 12 goody bags?

• 5

• 4

• 2

• 3

What is the GCF of 24 and 36?

• 6

• 12

• 10

• 8

What are the common prime factors of 42, 56, and 98?

• 2 and 5

• 3 and 7

• 2 and 7

• 2 and 3

What is the GCF of 42, 56, and 98?

• 7

• 21

• 28

• 14

What is the GCF of 15 and 49?

• 1

• 3

• 5

• 7

What are numbers called if their GCF is 1?

• Prime numbers

• Composite numbers

• Even numbers

• Co-primes