Understanding Least Common Multiple (LMC)

The video tutorial on Gis' channel teaches how to calculate the least common multiple (LCM) using two methods: the conventional method and the practical method. The conventional method involves listing multiples and identifying the smallest common multiple, while the practical method uses prime factorization. The tutorial provides examples with numbers 8, 12, 9, 15, and 18, demonstrating both methods. The video emphasizes the importance of understanding multiplication tables and prime numbers. Viewers are encouraged to subscribe to the channel for more educational content.

What does LMC stand for?

• Largest Multiple Common

• Least Common Multiple

• Least Multiple Common

• Largest Common Multiple

Which of the following is a step in the conventional method for finding LMC?

• Finding the smallest common multiple

• Subtracting the smallest number

• Using prime factorization

• Dividing by the largest number

In the conventional method, why is 0 not considered as the LMC?

• Because it is not a valid number

• Because it is not a common multiple

• Because it would be the LMC for all numbers

• Because it is not a multiple

What is the first step in the practical method for finding LMC?

• Subtract the smallest number

• Decompose into prime numbers

• Use the largest number

• List all multiples

Which prime number is typically used first in the practical method?

• 2

• 7

• 5

• 3

When using the practical method, what do you do after dividing by a prime number?

• Add the results

• Multiply the results

• List the results

• Subtract the results

In the example with numbers 9, 15, and 18, what is the LMC?

• 90

• 60

• 150

• 120

Why is it important to know prime numbers in the practical method?

• To subtract from the numbers

• To multiply the numbers

• To divide the numbers

• To add them to the list

What is the benefit of using the practical method over the conventional method?

• It uses fewer numbers

• It is more complex

• It is faster

• It is more accurate

What should you do after learning both methods for finding LMC?

• Practice both methods

• Forget the conventional method

• Use a calculator

• Only use the practical method