Finding LCM and GCF Concepts

The video tutorial explains how to find the least common multiple (LCM) and greatest common factor (GCF) of the numbers 10 and 25 using factor trees. It demonstrates the process of identifying prime factors and then calculating the LCM and GCF step-by-step. The tutorial concludes with a call to action to subscribe for more math and science videos.

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

• To divide the numbers

• To add the numbers

• To identify prime factors

• To simplify the numbers

What are the prime factors of 10?

• 3 and 5

• 5 and 7

• 2 and 3

• 2 and 5

Which of the following is a prime factor of 25?

• 3

• 2

• 5

• 7

What is the Least Common Multiple (LCM) of 10 and 25?

• 25

• 10

• 100

• 50

When finding the LCM, how many times should a common prime factor be used?

• Once

• Twice

• As many times as it appears

• Not at all

What is the Greatest Common Factor (GCF) of 10 and 25?

• 1

• 5

• 10

• 25

Which prime factor is common in both 10 and 25?

• 7

• 3

• 5

• 2

What is the smallest number that can divide both 10 and 25?

• 5

• 2

• 1

• 10

Why is 2 not considered in the GCF of 10 and 25?

• It is not a factor of 10

• It is not a factor of 25

• It is greater than 5

• It is not a prime number

What is the largest number that can divide both 10 and 25?

• 25

• 10

• 5

• 1