Question

In Writing All Of The Integers From 1 To 199, How Many Times Is The Digit 1 Used

Answer 1

Answer:

As you can see the numbers which can be formed with 1 as one of its digit are- 1,10,11,12,13,14,15,16,17,18,19, 21,31,41,51,61,71,81,91. Like wise 2-9 will also occur 20 times. From 100-199, the digit at hundred's place will repeat 120 times. In this case the digit at hundreds place is 1.