99000
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
19
100 (0-99)
49
There are 30 whole numbers that are odd numbers less than 60 which are also positive. Otherwise, there are infinitely many of them.
99000
the set of whole numbers less than 0
109 whole numbers greater than 9 and less than 999 are multiples of 9
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
220
There are 17 of them
45 of them.
9,000 of them are
19
19
There are 499 whole numbers that fit those conditions.