Finding the Greatest Common Factor

This video tutorial explains two methods to find the greatest common factor (GCF) of numbers. The first method involves listing all factors of the numbers and identifying the largest common factor. The second method uses prime factorization, where factor trees are created to find common prime factors. The video also demonstrates finding the GCF for three numbers using both methods. It concludes with a brief mention of additional resources for further learning.

What is the greatest common factor (GCF) of two or more numbers?

• The smallest number that divides all numbers

• The largest number that divides all numbers

• The sum of all numbers

• The product of all numbers

Which of the following is a method to find the GCF?

• Addition method

• Subtraction method

• Factor method

• Division method

When using the factor method, what is the first step?

• List all factors of each number

• List all numbers

• Multiply the numbers

• Find the prime factors

In the factor method, what do you do after listing all factors?

• Add the factors

• Find the largest common factor

• Multiply the factors

• Divide the factors

What is a factor tree used for?

• To add numbers

• To find prime factors

• To subtract numbers

• To divide numbers

How do you find the GCF using prime factors?

• Divide all prime factors

• Multiply all prime factors

• Add all prime factors

• Find common prime factors and multiply them

What is the GCF of 18, 24, and 36 using the factor method?

• 6

• 2

• 4

• 8

Which prime numbers are common in the prime factorization of 18, 24, and 36?

• 2 and 5

• 3 and 5

• 2 and 3

• 3 and 7

What should you do if more than one prime number is common in the lists?

• Add them together

• Multiply them together

• Subtract them

• Divide them

Where can you find more resources on factoring?

• In the video title

• In the playlist mentioned

• In the video comments

• In the video description