Finding Factor Pairs Using Number Line

The video tutorial explains the concept of factors and factor pairs, using a number line to find all factor pairs for a given whole number. The example of the number 20 is used to demonstrate the process, identifying factor pairs such as 1 and 20, 2 and 10, and 4 and 5. The tutorial also explains why certain numbers, like 3, are not factors of 20. The lesson concludes by summarizing the factor pairs and factors of 20, emphasizing the method of using a number line to find them.

What is a factor of a number?

• A number that is always greater than the original number

• A whole number that can be multiplied by another to get the original number

• A number that can be divided by another number

• A number that is always less than the original number

Which of the following is a factor pair of 20?

• 8 and 2

• 5 and 6

• 2 and 10

• 3 and 7

Why is 3 not considered a factor of 20?

• Because 3 is less than 20

• Because 3 cannot be multiplied by any whole number to get 20

• Because 3 is greater than 20

• Because 3 is not a whole number

What is the last factor pair of 20 found using the number line?

• 1 and 20

• 2 and 10

• 4 and 5

• 3 and 6

Which of the following lists all the factors of 20?

• 1, 2, 4, 5, 10

• 1, 2, 4, 5, 10, 20

• 1, 2, 3, 4, 5, 10, 20

• 2, 4, 5, 10, 20