LCM and GCF of 12 and 18

The video tutorial explains how to find the least common multiple (LCM) and greatest common factor (GCF) of the numbers 12 and 18 using prime factorization. It begins with creating factor trees for both numbers to identify their prime factors. The tutorial then demonstrates organizing these factors in a chart to simplify calculations. For the LCM, it involves multiplying the highest power of all prime factors, resulting in 36. For the GCF, it involves multiplying only the common prime factors, resulting in 6. The video concludes with a summary of the results and a reminder to be kind.

What mathematical concepts are being explored in this video?

• Fractions and Decimals

• LCM and GCF

• Multiplication and Division

• Addition and Subtraction

What is the first step in finding the prime factors of a number?

• Creating a factor tree

• Adding the digits

• Multiplying by 2

• Dividing by 10

Which of the following is a prime factor of 12?

• 2

• 9

• 4

• 6

How are the prime factors organized to help find the LCM?

• In a chart

• In a list

• In a table

• In a paragraph

What is the LCM of 12 and 18?

• 48

• 24

• 36

• 30

When calculating the LCM, what do you do if you have two of the same prime numbers?

• Multiply them

• Bring down one

• Ignore one

• Add them

What is the GCF of 12 and 18?

• 2

• 4

• 8

• 6

How do you determine the GCF from the prime factors?

• Multiply all factors

• Add all factors

• Multiply only pairs

• Divide by the largest factor

Which pair of numbers is used to find the GCF in this video?

• Pair of 2s

• Pair of 3s

• Pair of 5s

• Pair of 7s

What is the final message of the video?

• Math is fun

• Kindness multiplies kindness

• Always double-check your work

• Practice makes perfect