As the question asks "since" then May 28 would be day 1, but your calculations would still indicate that the correct answer should be 203 (I still got it wrong, though ). If the question had read: "How many days has Elvenar International been open", the answer would be the 204.I do have an issue with the answer for day 16, As of the time of this post, how many days has it been since Elvenar International opened?
The answer given is 202 + or - 1 day. The following is quoted from the website:
"We would like to thank everyone of you, our Community, for helping us test the game here on Beta and making it possible to launch our International and German versions today!
Muf-Muf,May 27, 2015"
May 27 - 31 = 5 inclusive
June = 30
July = 31
August = 31
September = 30
October = 31
November = 30
December = 16 by the day count of the question.
Total = 5+30+31+31+30+31+30+16 = 204 days
Are you not including the first day?