Finding GCF and LCM Concepts

This video tutorial from MooMooMath and Science explains how to find the Lowest Common Multiple (LCM) and the Greatest Common Factor (GCF) of the numbers 16 and 24 using a factor tree and a chart. The instructor demonstrates the process of prime factorization for both numbers, organizes the factors in a chart, and explains how to calculate the LCM by multiplying the highest power of each prime number. The video also covers finding the GCF by identifying common prime factors in pairs. The tutorial concludes with a summary of the results: the LCM is 48 and the GCF is 8.

What is the purpose of using a factor tree in this video?

• To add numbers

• To subtract numbers

• To find the LCM and GCF

• To divide numbers

Which of the following is a prime factor of 16?

• 2

• 7

• 3

• 5

What is the last prime factor of 24?

• 2

• 7

• 5

• 3

How many times does the number 2 appear in the prime factorization of 16?

• 1

• 2

• 3

• 4

What is the rule for selecting numbers when finding the LCM?

• Use only odd numbers

• Use all numbers twice

• Use each number only once

• Use only even numbers

What is the LCM of 16 and 24?

• 32

• 64

• 72

• 48

When finding the GCF, what should you do with the numbers?

• Use them in pairs

• Ignore them

• Use them individually

• Use them in triples

What is the GCF of 16 and 24?

• 6

• 10

• 4

• 8

What is the final step in finding the GCF?

• Add the numbers

• Subtract the numbers

• Divide the numbers

• Multiply the numbers

What is the key takeaway from the video?

• Always use a calculator

• Math is difficult

• Numbers are confusing

• Kindness multiplies kindness