Finding Factors and GCF

The video tutorial covers the concept of factors, specifically focusing on finding the greatest common factor (GCF) of given numbers. It begins with an introduction to factors, explaining that they are numbers that divide another number without leaving a remainder. The tutorial then demonstrates how to find the factors of 12 and 66, and subsequently 32 and 48, using a systematic approach. The GCF is identified as the largest factor common to both numbers in each pair. The video concludes with a summary of the answers obtained for the exercises.

What is a factor of a number?

• A number that is equal to the given number.

• A number that is always less than the given number.

• A number that is always greater than the given number.

• A number that divides another number without leaving a remainder.

Which of the following is a factor of 4?

• 6

• 2

• 3

• 5

What are the first two factors of any number?

• 1 and 2

• 2 and the number itself

• 1 and the number itself

• The number itself and 0

Which of the following is NOT a factor of 12?

• 6

• 4

• 5

• 3

Which of the following is a factor of 66?

• 9

• 11

• 5

• 7

What is the greatest common factor of 12 and 66?

• 6

• 12

• 1

• 3

What is the first step in finding the GCF of two numbers?

• List all the factors of each number.

• Multiply the two numbers.

• Add the two numbers.

• Subtract the smaller number from the larger number.

Which of the following is NOT a factor of 32?

• 4

• 5

• 16

• 8

Which of the following is a factor of 48?

• 12

• 9

• 5

• 7

What is the greatest common factor of 32 and 48?

• 8

• 16

• 24

• 32