Question

write divisibility rule of 9​

Answer 1

The Rule for 9: The prime factors of 9 are 3 and 3. So we can use a very similar rule to determine if a number is divisible by 9. Basically, we will see if the sum of the digits is divisible by 9. If it is, then the actual number is also divisible by 9.

Answer 2

Answer:

first add the numbers given if the sum is divisible by 9 it is divisible by 9

eg279

2+7+9=18=1+8=9 divisible by 9

273=2+7+3=12=1+2=3 not divisible by 9

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