Question

divisibility test for 9​

Answer 1

Answer:

The sum of digits of all these numbers is itself a multiple of 9. For example, 18 is 1+8 = 9, which is divisible by 9, 27 is 2+7 = 9, which is divisible by 9, etc. So, as per the divisibility test of 9, if the sum of all the digits of a number is a multiple of 9, then the number is also divisible by 9.

Answer 2

Step-by-step explanation:

The divisibility rule of 9 helps us to find whether a number is a multiple of 9 or not without performing the actual division.