It is 200.
Most schools teach you to always round 5 up (to 300). However, doing so is inappropriate because it introduces an upward bias. The IEEE (Institute of Electronic and Electrical Engineers) standard 754 is to round 5 up or down so that the new last digit is even. See link for more: //en.wikipedia.org/wiki/Rounding#Round_half_to_even
It is 250 rounded to the nearest 100 is 300
300
254 rounded to the nearest then is 250.
200
250 rounded the nearest hundreds place is 300.
250
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
250
250
250
250
250