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Discussion

  1. Which one of the following number is divisible by 11 ?
    1. 45678940
    2. 54857266
    3. 87524398
    4. 93455120
  1. Correct Option: D

    We know that, a number is divisible by 11 when the sum of the difference between the sum of its digit at even places and sum of its digit at odd places is either 0 or the difference is divisible by 11.

    For 93455120
    Sum of even places = 3 + 5 + 1 + 0 = 9
    Sum of odd places = 9 + 4 + 5 + 2 = 20

    There difference = 20 - 9 = 11
    which is divisible by 11 so 93455120 is divisible by 11.


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