Question 25
January 23, 2019 can be written in 8-digit date format 23/01/2019. September 2, 2019 can be written 02/09/2019. How many digit 1s occur in all 8-digit dates of 2019? (For example, 25/01/2019 contains two 1s.)
Input: enter the requested whole-number answer without units. You may omit leading zeroes from the paper answer grid.
Input: enter the requested whole-number answer without units. You may omit leading zeroes from the paper answer grid.