Question

what is the divisibility rule of 9 ? ​

Answer 1

DIVISIBLITY RULE OF 9 IS THAT THE LAST THREE DIGIT SUM MUST BE DIVISIBLE BY 9

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Answer 2

A number divisible by 9 if the sum of its digit is divisible by 9

                               EXAMPLE

Which of the following numbers are divisible by 9

(1) 6732018

(2)5683712

SOLUTION

(1)HERE THE SUM OF DIGITS = 6+7+3+2+0+1+8=27,which is divisible by 9 .

THEREFORE ,6732018 IS DIVISIBLE BY 9

(2) HERE THE SUM OF DIGITS= 5+6+8+3+7+1+2=32, WHICH IS NOT DIVISIBLE BY 9 . THEREFORE ,563712 IS NOT DIVISIBLE BY 9

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