If the sum of all the digits is divisible by 9, then the entire number is divisible by 9! For example: 9,728,127 is divisible by 9. 9+7+2+8+1+2+7=36, and I know 36 is divisible by 9. Therefore, the whole number is. 982 is not. 9+2+8=19. 19 is not divisible by 9.
Works for really huge numbers too. 3,456,245,190,769,984,245,865,992,831 The sum of the digits is 144. Unsure if that works? Find the sum of THOSE digits (and keep doing that until you get something that you KNOW is divisible by 9). 1+4+4=9. That means the whole huge number is divisible by 9!
It is 3 6 9
Yes. It is the divisibility rule for 9.
If the digit sum of a number adds up to 9 then it is divisible by 9.
It is even and the sum of its digits is divisible by 9.
9 because the digits of 36 add up to 9
Its digits add up to 9 so therefore it is divisible by 9
By tautology. If it did not work, it would not be a divisibility rule!
Because the final digital sum is 9 then it is divisible by 9 as follows 1827/9 = 203
If all the digits add up to 9 then it is divisable by 9
add all the digits together and see if it is divisible by nine.
What is the divisblity rule by 8
There is no easy rule for divisibility by 34.