Finding LCM and GCF Using Ladder Method

This video tutorial demonstrates how to find the Lowest Common Multiple (LCM) and Greatest Common Factor (GCF) using the ladder method. The instructor begins by selecting two numbers, 48 and 72, and explains the process of finding the smallest prime number that divides both numbers. The tutorial continues with step-by-step instructions on dividing the numbers by these primes, constructing a ladder, and calculating the LCM and GCF. The video concludes with a summary of the method and a call to action for viewers to engage with the content.

What does LCM stand for?

• Largest Common Measure

• Lowest Common Measure

• Largest Common Multiple

• Lowest Common Multiple

What does GCF stand for?

• Greatest Common Function

• Greatest Common Formula

• Greatest Common Fraction

• Greatest Common Factor

Which two numbers are chosen to find the LCM and GCF?

• 6 and 9

• 12 and 18

• 48 and 72

• 24 and 36

What is the first step in the ladder method?

• Find the largest prime number

• Find the smallest prime number

• Divide by any number

• Multiply the numbers

What is the smallest prime number that divides both 48 and 72?

• 3

• 5

• 2

• 7

After dividing 48 and 72 by 2, what are the resulting numbers?

• 24 and 36

• 12 and 18

• 6 and 9

• 3 and 4

What is the first number used in the ladder method for 48 and 72?

• 2

• 7

• 3

• 5

What is the next smallest prime number used after dividing by 2 three times?

• 11

• 3

• 7

• 5

What is the result of 6 divided by 3 in the ladder method?

• 3

• 4

• 2

• 1

What is the result of 9 divided by 3 in the ladder method?

• 1

• 2

• 3

• 4