Question

divisibilty rule of 11​

Answer 1

Answer:

If the number of digits is even, add the first and subtract the last digit from the rest. The result must be divisible by 11. If the number of digits is odd, subtract the first and last digit from the rest. The result must be divisible by 11.

Answer 2

Answer:

sum of odd number and sum of even number different between them which is divisible by 11