Finding the Least Common Multiple

This video tutorial explains how to find the least common multiple (LCM) of two, three, and four numbers. It covers methods such as listing multiples and using Excel functions to determine the LCM. The tutorial also discusses the concept of multiplying numbers to find common multiples, though it may not always yield the LCM. Examples are provided for each method, demonstrating how to find the LCM for different sets of numbers.

What is the least common multiple of 4 and 6?

• 8

• 14

• 10

• 12

Which Excel function can be used to find the LCM of two numbers?

• =GCD

• =LCM

• =SUM

• =PRODUCT

What is the LCM of 8 and 9?

• 81

• 72

• 90

• 64

How can you find the LCM of three numbers using Excel?

• =GCD(2,3,4)

• =PRODUCT(2,3,4)

• =SUM(2,3,4)

• =LCM(2,3,4)

What is the LCM of the numbers 2, 3, and 4?

• 12

• 10

• 8

• 6

What is the LCM of 3, 4, and 5?

• 30

• 60

• 40

• 50

Why might multiplying numbers not always give the LCM?

• It gives the greatest common divisor

• It gives a common multiple, not necessarily the least

• It always gives the LCM

• It only works for even numbers

What is the LCM of 6, 9, 12, and 18?

• 36

• 42

• 24

• 30

Which method can be used to confirm the LCM of four numbers?

• Both A and B

• Using Excel's =LCM function

• Neither A nor B

• Listing multiples

What is the benefit of using Excel to find the LCM?

• It is slower but more reliable

• It is faster and more accurate

• It only works for two numbers

• It requires manual calculation