Any from 450 to 549
949.9999...
749 rounded to the nearest hundred is 700
850 and 949 rounded the nearest hundred is 900
0
800
949.9999...
The greatest whole number would be 499.
If you're talking about whole numbers, then it's 6,049 .If you're talking about any number, including decimals and fractions, then there's no "greatest possible" one.
749 rounded to the nearest hundred is 700
600
850 and 949 rounded the nearest hundred is 900
3200
500
0
The smallest number that is 600 when rounded to the nearest hundred is 550. The largest number that is 600 when rounded to the nearest hundred is 649.
600
800