Finding the Least Common Multiple (LCM) of Two or More Numbers

This video tutorial teaches how to find the least common multiple (LCM) of two or more numbers. It explains the concept of multiples, differentiates them from factors, and demonstrates the process of finding LCM through examples. The tutorial covers finding the LCM of 12 and 15 by listing and comparing multiples, and extends the method to find the LCM of 4, 7, and 12. The lesson concludes with a recap of the key points.

What is a common mistake when identifying multiples?

• Confusing multiples with factors

• Listing numbers in descending order

• Using addition instead of multiplication

• Counting by ones

Which of the following is a multiple of both 9 and 5?

• 25

• 45

• 55

• 35

What is the least common multiple of 12 and 15?

• 60

• 45

• 75

• 30

When finding the LCM of 4, 7, and 12, which number's multiples should you start with?

• 7

• Any of the numbers

• 4

• 12

What is the least common multiple of 4, 7, and 12?

• 48

• 60

• 72

• 84