277299999
4,999 is the greatest whole number.
22999
It is 2773049 to the nearest 100.
350
94 is the greatest two-digit whole number that when rounded to the nearest ten rounds to a two-digit number.
850 to 949
The greatest whole number would be 499.
749
14, which rounds down to 10.
50
949, which rounds down to 900.
It could be 7499 rounded to the nearest 5000.