Greatest Common Factor and Least Common Multiple

The video tutorial covers the concepts of Greatest Common Factor (GCF) and Least Common Multiple (LCM). It begins with definitions and examples of GCF, using numbers 32 and 48 to illustrate how to find common factors. The tutorial explains the importance of GCF in simplifying fractions. It then introduces LCM, using numbers 3 and 4 to demonstrate finding common multiples, and highlights its application in adding fractions. The video emphasizes the practical uses of GCF and LCM in mathematical operations.

What do GCF and LCM stand for?

• Greatest Common Factor and Least Common Multiple

• Greatest Common Multiple and Least Common Factor

• Greatest Common Factor and Least Common Fraction

• Greatest Common Fraction and Least Common Multiple

Why are GCF and LCM important?

• They are not important

• They are used in geometry

• They are used in simplifying fractions and finding common denominators

• They help in solving algebraic equations

What is the GCF of 32 and 48?

• 4

• 8

• 32

• 16

Which of the following is a factor of 32?

• 20

• 16

• 10

• 5

How can you check if a number is divisible by 3?

• Multiply it by 3

• Add the digits and see if the sum is divisible by 3

• Divide it by 3 and check for a remainder

• Check if it ends in 3

What is the greatest common factor of 18 and 24?

• 18

• 6

• 8

• 12

Which of the following is a factor of 48?

• 5

• 24

• 10

• 16

What is the greatest common factor of 20 and 30?

• 5

• 20

• 10

• 15

Which of the following is a factor of 60?

• 7

• 10

• 15

• 25

What is the greatest common factor of 15 and 25?

• 5

• 3

• 15

• 10