Number divisible by 11
If the difference between the sums of the digits at even places and the sum of digits at odd places is either 0 or divisible by 11.
Ex: 4527039
Digits on even places: 4 + 2 + 0 + 9 =15
Digits on odd places: 5 + 7 + 3 = 15
Difference between odd and even = 0
Therefore, number is divisible by 11
