Finding the Prime Factors of a Number

This video tutorial explains how to find the prime factors of a number using the factor tree method. It begins with an introduction to prime factors and demonstrates the factor tree method with examples. The video also covers how to list prime factors in index form and concludes with practice questions for viewers to try on their own.

What is a prime factor?

• A number that can be divided by 1 and itself only.

• A number that can be divided by any other number.

• A number that is the sum of two prime numbers.

• A number that is a multiple of 10.

What is the first step in creating a factor tree?

• Multiply the number by 2.

• Write down all the prime numbers.

• Write the number at the top of the tree.

• Divide the number by 10.

In the factor tree method, what do you do when you reach a prime number?

• Erase it from the tree.

• Circle it as a prime factor.

• Multiply it by 2.

• Ignore it and move on.

How do you list prime factors in index form?

• By writing them in order from largest to smallest.

• By writing them in reverse order.

• By writing them in alphabetical order.

• By writing them in order from smallest to largest and using powers.

What is the purpose of using the factor tree method?

• To multiply a number by 2.

• To divide a number by 10.

• To find the prime factors of a number.

• To find the sum of all factors.