90 of them.
46
Seven of them.
There are 5 of them.
There are nine of them. They are:108117126135144153162171180
There are 90 two-digit whole numbers between 1 and 100.
there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100
There are 900 three digit numbers between 99 and 3,000 - ranging from 100 to 999
90 of them.
46
Seven of them.
There are 5 of them.
There are nine of them. They are:108117126135144153162171180
138 of them.
17
30 of them.
There are 8 numbers between 100 and 200 (inclusive) that have a digit sum of 12, namely: 129, 138, 147, 156, 165, 174, 183, 192.