Prime Factors and GCF/LCM Concepts

The video tutorial explains how to find the least common multiple (LCM) and greatest common factor (GCF) of the numbers 10 and 8 using a factor tree method. It involves breaking down the numbers into their prime factors, organizing them in a chart, and applying specific rules to calculate the LCM and GCF. The LCM is found by multiplying the highest power of all prime numbers, while the GCF is determined by multiplying the common prime factors. The video concludes with a reminder to practice kindness.

What is the purpose of using a factor tree in this lesson?

• To divide numbers

• To find prime factors

• To add numbers

• To subtract numbers

Which of the following is a prime factor of 10?

• 6

• 5

• 4

• 3

How many times does the number 2 appear as a prime factor of 8?

• 4

• 3

• 2

• 1

What is the purpose of creating a chart in this lesson?

• To write a story

• To draw pictures

• To organize prime factors

• To keep track of calculations

When calculating the LCM, what should you do if you have a pair of the same number?

• Multiply the pair

• Bring down one number

• Bring down both numbers

• Ignore the pair

What is the LCM of 10 and 8?

• 30

• 40

• 20

• 50

What rule do you follow when calculating the GCF?

• Bring down all numbers

• Bring down only one number

• Bring down pairs

• Ignore all numbers

What is the GCF of 10 and 8?

• 3

• 2

• 4

• 1

What is the final message of the lesson?

• Be kind to someone today

• Always do your homework

• Practice makes perfect

• Study hard