500
The critical bit of information: the number after "nearest" is missing from the question.
500
The largest integer that, when rounded to the nearest hundred, would round to 500, is 549.
1000
500
749, to the nearest 500.
500
To the nearest 1000 it is 500.
It is 549 rounded to the nearest 100 is 500
749.99... to the nearest 500.
The largest number that will round up or down to 500 is 499.5. When rounding to the nearest whole number, 499.5 would round up to 500. Similarly, when rounding to the nearest ten, hundred, or thousand, 499.5 would also round to 500. Any number greater than 499.5 would round up to a number greater than 500.
To the nearest whole number is is 478.
500
500 can't be rounded up or down and must remain as 500.
The critical bit of information: the number after "nearest" is missing from the question.
Well, isn't that a happy little question! When you round numbers to the nearest 500, you can round any number to the nearest 500. That means there are infinite numbers that can be rounded to 500. Just remember, there are no mistakes in rounding, only happy little accidents!