Finding GCF and LCM of Numbers

This video tutorial covers the concepts of factors and multiples, focusing on the greatest common factor (GCF) and the least common multiple (LCM). It explains how to find the GCF and LCM of numbers, using examples and factor trees. The tutorial emphasizes the importance of these concepts in mathematics, especially in algebra and fractions. It provides practice problems to help solidify understanding and introduces factor trees as a useful tool for larger numbers.

What is the main focus of this lesson?

• Learning about factors and multiples

• Studying probability and statistics

• Exploring geometry concepts

• Understanding algebraic expressions

What does GCF stand for?

• Greatest Common Function

• Greatest Common Factor

• Greatest Common Fraction

• Greatest Common Formula

Which of the following is a factor of 10?

• 9

• 3

• 7

• 5

What is the greatest common factor (GCF) of 12 and 15?

• 1

• 4

• 2

• 3

What is a factor tree used for?

• Calculating the sum of a series

• Breaking down a number into its prime factors

• Solving algebraic equations

• Finding the multiples of a number

What are the factors of 25?

• 1, 5, 25

• 1, 2, 25

• 1, 3, 25

• 1, 4, 25

What is a multiple of a number?

• A number that is subtracted from another number

• A number that is added to another number

• A number that is the product of a given number and an integer

• A number that divides another number evenly

What is the least common multiple (LCM) of 4 and 5?

• 20

• 15

• 10

• 25

What is the greatest common factor (GCF) of 8 and 16?

• 6

• 2

• 8

• 4

What is the least common multiple (LCM) of 4 and 6?

• 14

• 10

• 8

• 12