Finding the GCF of 3 Numbers

The video tutorial explains the concept of the greatest common factor (GCF) and demonstrates how to find it using the example of the number 42. The instructor guides viewers through listing factors of 42, identifying the largest common factor among given numbers, and verifying the GCF. The tutorial concludes with a method for quickly finding the GCF in multiple-choice scenarios.

What does GCF stand for?

• Greatest Common Factor

• Greatest Common Function

• Greatest Common Fraction

• Greatest Common Formula

What is the first step in finding the GCF of a set of numbers?

• List all numbers

• Divide all numbers by 2

• Take the largest number

• Take the smallest number

Which of the following numbers is a factor of 42?

• 5

• 9

• 6

• 8

Why do we start with the largest factor when finding the GCF?

• Because it is easier to calculate

• Because we are looking for the largest number that divides all

• Because it is the smallest number

• Because it is the first number in the list

How can you verify if a number is the GCF of a set?

• By adding it to each number

• By multiplying it with each number

• By dividing each number by it and checking for whole numbers

• By subtracting it from each number