Divisibility Rules for 9

The video tutorial explains how to determine if a number is divisible by 9 by adding its digits. If the sum of the digits is divisible by 9, then the entire number is divisible by 9. An example is provided to illustrate this method, showing that the number 414 is divisible by 9.

What is the first step to determine if a number is divisible by 9?

• Multiply the number by 9

• Subtract 9 from the number

• Divide the number by 9

• Add the digits of the number

If the sum of the digits of a number is 9, what can be concluded about the number?

• It is divisible by 3

• It is a prime number

• It is divisible by 9

• It is not divisible by 9

What is the sum of the digits of 414?

• 8

• 11

• 9

• 10

What is the result of 456 multiplied by 9?

• 4,200

• 4,500

• 4,056

• 4,104

Which of the following numbers is divisible by 9?

• 414

• 345

• 234

• 123