Determine 2250

The day number is the serial number of the day in the relevant month (ie the number on 5 August 2016 is 5). The digit sum of the day is the sum of the values ​​of all digits on the date of that day (ie the digit sum on August 5, 2016 is 5 + 8 + 2 + 0 + 1 + 6 = 22). A lucky day is one whose day number is equal to the digit of the day. Determine how many happy days there are in 2016 and which they are.

Correct answer:

n =  10

Step-by-step explanation:

20.9.2016
21.9.2016
22.9.2016
23.9.2016
24.9.2016
25.9.2016
26.9.2016
27.9.2016
28.9.2016
29.9.2016




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