LCM and GCF of 40 and 16

This video tutorial from MooMooMath and Science explains how to find the least common multiple (LCM) and greatest common factor (GCF) of the numbers 40 and 16 using a factor tree method. The instructor demonstrates how to break down the numbers into their prime factors and organize them in a chart to calculate both the LCM and GCF. The video concludes with a summary of the results and a call to subscribe for more math and science content.

What is the purpose of using a factor tree in finding the LCM and GCF?

• To simplify the numbers

• To divide the numbers

• To organize the factors

• To add the numbers

Which of the following is a prime factor of 40?

• 6

• 5

• 3

• 8

What is the result of 2 times 5 in the factor tree of 40?

• 20

• 25

• 15

• 10

What is the first step in breaking down the number 16 using a factor tree?

• Divide by 2

• Divide by 3

• Divide by 5

• Divide by 4

Which of the following is a prime factor of 16?

• 5

• 4

• 3

• 2

What is the purpose of creating a chart in the LCM and GCF process?

• To add the numbers

• To organize the factors

• To divide the numbers

• To subtract the numbers

What is the LCM of 40 and 16?

• 40

• 60

• 100

• 80

How do you find the GCF using the chart?

• Divide all numbers

• Look for pairs and multiply

• Multiply all numbers

• Add all numbers

What is the GCF of 40 and 16?

• 6

• 10

• 8

• 4

Which number is not paired in the GCF chart for 40 and 16?

• 2

• 5

• 8

• 10