Divisibility Rules for 5 and 10

This lesson covers quick methods to determine if a whole number is divisible by 5 or 10. For divisibility by 5, a number must end in 0 or 5. For divisibility by 10, the number must end in 0. Examples are provided to illustrate these rules, such as 325 and 110 being divisible by 5, and 110 being divisible by 10, while 203 and 101 are not. The lesson concludes with a recap of these divisibility checks.

What is the key characteristic of a number that makes it divisible by 5?

• The number ends in 1 or 9.

• The number is a multiple of 3.

• The number is even.

• The number ends in 0 or 5.

Which of the following numbers is NOT divisible by 5?

• 203

• 50

• 110

• 325

How can you determine if a number is divisible by 10?

• The number ends in 0.

• The number is odd.

• The number ends in 5.

• The number is a multiple of 7.

Which of these numbers is divisible by 10?

• 101

• 110

• 115

• 123

What did you learn about divisibility rules in this lesson?

• How to solve quadratic equations.

• How to add fractions.

• How to check if a number is divisible by 5 and 10.

• How to multiply numbers quickly.