24
As a digit in other numbers it appears 20 times
18
18 times
A total of 44 times.
20000 times
11 times
As a digit in other numbers it appears 20 times
18
Including the one in ' 1 ' and the one in '100', there are 21 1s.Every other digit 2 - 9 appears 20 times between 1 and 100 .
18 times
A total of 44 times.
20000 times
200
200
16
Infinitely many.
Assuming you mean in the numbers 1, 2, 3, ..., 998, 999, 1000 then the digit 0. (The digit 1 appears 301 times, the digits 2-9 all appear 300 times each, but the digit 0 only appears 192 times.)