Answer The sum of the digits of the given number should be divisible by 9. For example, 2979 is divisible by 9. (i.e.,) 2+9+7+9 = 27, which is divisible by 9.
What is the Divisibility Rule of 9?The divisibility rule of 9 states that if the sum of all the digits of a number is divisible by 9, then the number would be divisible by 9. It helps us to find whether 9 is a factor of any number or not without performing the actual division. For example, let us check if 85304 is divisible by 9. Since 8 + 5 + 3 + 0 + 4 = 20 and 20 is not divisible by 9, it can be said that 85304 is not divisible by 9.