As a digit in other numbers it appears 20 times
18
20000 times
A total of 44 times.
Infinitely many.
11 times
As a digit in other numbers it appears 20 times
18
20000 times
A total of 44 times.
200
200
16
Infinitely many.
140
700000
If 11 and 111 is counted as 1 digit, the answer is 119.If 11 is counted as 2 digit 1's, the answer is 131.