Question

Test the divisibility of the following number by 9
(a) 199990
(b) 122364

Answer 1

Answer:

b)122364

To test the divisibility rule of 9 add the digits of the number

So,1+2+2+3+6+4=18

And then if the sum of digits is divisible by 9 then the whole number is divisible by 9.

So, as 18 is divisible by 9, so, 122364 is divisible by 9

Answer 2

divisibility of 9:- if sum of the all digit in the no. is add up to a multiple of 9 than the no. is also divisible by 9