Ladder Method for LCM and GCF

The video tutorial explains how to find the Least Common Multiple (LCM) and Greatest Common Factor (GCF) using the ladder method. It begins by introducing the method and demonstrating how to write numbers in a line and create a ladder. The tutorial then guides viewers through dividing the numbers by the smallest prime number until all numbers are prime. Finally, it shows how to calculate the LCM by multiplying all numbers on the ladder and the GCF by multiplying the numbers in a straight line.

What is the purpose of using the ladder method in mathematics?

• To calculate the average of a set of numbers

• To solve quadratic equations

• To determine the LCM and GCF of numbers

• To find the sum of two numbers

What is the first step in the ladder method?

• Multiply the numbers together

• Write the numbers in one line

• Write the numbers in a vertical line

• Divide the numbers by 3

Which prime number is used first in the ladder method for 24 and 36?

• 5

• 7

• 3

• 2

After dividing 24 and 36 by 2, what are the resulting numbers?

• 8 and 16

• 12 and 18

• 15 and 25

• 10 and 20

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

• 3

• 11

• 5

• 7

What are the final numbers obtained after all divisions in the ladder method?

• 1 and 1

• 2 and 3

• 3 and 4

• 5 and 6

How is the LCM calculated using the ladder method?

• By adding all the numbers on the L

• By dividing the numbers on the L

• By multiplying all the numbers on the L

• By subtracting the numbers on the L

What is the LCM of 24 and 36 using the ladder method?

• 60

• 84

• 48

• 72

How is the GCF determined in the ladder method?

• By dividing the numbers straight down the line

• By subtracting the numbers straight down the line

• By multiplying the numbers straight down the line

• By adding the numbers straight down the line

What is the GCF of 24 and 36 using the ladder method?

• 12

• 10

• 8

• 6