100 (0-99)
42
99000
The whole numbers less than 12 are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. There are a total of 12 whole numbers in this range. Therefore, the number of whole numbers less than 12 is 12.
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
19
There are 30 whole numbers that are odd numbers less than 60 which are also positive. Otherwise, there are infinitely many of them.
99000
42
500
There are 17 of them
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
19
19
2545 to 2554 -- ten of them.
109 whole numbers greater than 9 and less than 999 are multiples of 9
9,000 of them are
There are 499 whole numbers that fit those conditions.