
A natural number is divisible by 9 if and only if the sum of its digits is divisible by 9.
Example: Is 2367 divisible by 9? The sum of all digits in given number = 2 + 3 + 6 + 7 = 18 18 is divisible by 9. Therefore, 2367 is divisible by 9.
Example: Is 2080 divisible by 9? Directions: Choose the correct answer. Also write at least 10 examples of your own. 