90
There are 90 two-digit whole numbers between 1 and 100.
11 times
18
19 of them
1
There are 90 two-digit whole numbers between 1 and 100.
The digit appears eleven time from 1 to 100.
There are four of them.
There are 5 of them.
11 times
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 .
17
18
how does 100 meet the specification? 1 is in the hundreds digit and 0 is in the tens digit. 1 is not at least 0. this is a confusing question?!
The largest 3-digit number=999 the smallest 3-digit number=100 total number of 3 digit number=(999-100)+1 =899+1=900
12.
19 of them