Question

Add the digits of the number72,54,21,117,222
7+2=9
5+4=9
2+1=3
1+1+7=9
2+2+2=6
The sum of the digits of above numbers is divisible by 3​

Answer 1

yes all numbers are divisible by 3

the trick to find divisibility of 3 is

first of all, add all the digits of the number if the sum of them is divisible by 3 then the number is divisible by 3.