Question

Write the divisibility 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:

The sum of odd places and the sum of even places should be same.

For example, take the number 2321.

The odd places are 3 and 1.

The even places are 2 and 2.

The um of both odd and even places are same.

So, 2321 is divisible by 11.