• + 6 comments

    why 23 in between 21 and 25 is not lucky number,

    as we are getting digit sum 5, and sum of square of digits are 13.

    • + 0 comments

      i think the same like you, can't understand anyone who get max score in this task

    • + 1 comment

      going by problem description looks like 23 should be lucky number, either description of problem is wrong or test case.

      • + 0 comments

        I agree .. the test cases are wrong ... 23 is a lucky number!

    • + 0 comments

      Yes, it's been 3 month, why is nobody fixing this?

    • HackerRank Admin
      + 0 comments

      Thank you for pointing this out. It has been corrected.

    • + 0 comments

      Man, I think that in fact there are no unlucky numbers and this is all rave.