Question

If the sum of all digits of a Number is divisible by nine then the number must also be divisible by 3

Answer 1

Answer:

for example we take 1278

sum of all digits of 1278

=1+2+7+8=18

18 is divisible by 9 and 3

by this we can conclude that every number which is divisible by 9 is also divisible by 3.