If you write all the whole numbers upto 100000, the number of times you write the digit '1' is A and the number of times you write the digit '2' is B. what is the value of A-B ?
Both digits, 1 and 2, appear 50,000 times each between 1 and 100,000, including ALL duplicates such as 111, 2222.....etc.
If you exclude All duplicates, then both 1 and 2 appear 40,951 times each between 1 and 100,000 inclusive.
