Depends. When you round off something, it has to be to a value. 250 rounded off to its nearest tens place would be 250, rounded to its nearest hundreds place would be 300.
250
Anything from 225 to 274 to the nearest 25 will round to 250 Anything from 249.5 to 250.4999999999999999... to the nearest whole number will round to 250
250
To the nearest ten, 250
It is 250
250
250
Not exactly because 250 mm = 25 cm
250 rounds to:0 to the nearest thousand300 to the nearest hundred250 to the nearest ten
250 msec
200 and 250 respectively.
To the nearest hundred: 300 To the nearest ten: 250 To the nearest one: 251