Understanding Least Common Multiple

The video tutorial covers Lesson 17 on common multiples, focusing on the concept of the least common multiple (LCM). It explains the definition of LCM and demonstrates how to find the LCM of different pairs of numbers, such as 6 and 8, 10 and 8, and 7 and 9. The tutorial emphasizes the importance of identifying common multiples and selecting the smallest one shared by the numbers. The lesson concludes with a reminder of the keyword 'least common multiple' and encourages students to ask questions if needed.

What is the least common multiple of 6 and 8?

• 30

• 24

• 18

• 12

What does the term 'least common multiple' refer to?

• The sum of two numbers

• The difference between two numbers

• The smallest number that is a multiple of two numbers

• The largest number that divides two numbers

Which of the following is a common multiple of 10 and 8?

• 40

• 30

• 20

• 50

What is the least common multiple of 10 and 8?

• 20

• 30

• 40

• 50

Which number is a common multiple of both 7 and 9?

• 63

• 56

• 49

• 72

What is the least common multiple of 7 and 9?

• 81

• 54

• 63

• 72

If you continue listing multiples of 7 and 9, what will you find?

• A smaller common multiple

• No more common multiples

• The same common multiple

• Another common multiple greater than 63

What is the keyword for this lesson?

• Multiplication Table

• Greatest Common Divisor

• Least Common Multiple

• Prime Factorization

Why is it important to find the least common multiple?

• To subtract two numbers

• To add two numbers

• To solve problems involving fractions and ratios

• To find the largest number that divides two numbers

What should you do if you have questions about the lesson?

• Search online

• Ask the teacher

• Wait for the next lesson

• Ignore them