It is 600 when rounded to the nearest 100
0
122 to the nearest 100 is 100
103 to the nearest hundreds is 100
75 rounded to the nearest 100 is 100.
100
100
4198 to the nearest 100 = 4200
100
100
599 to the nearest 100 is 600.
2500 is already at the nearest 100.
204 to the nearest 100 is 200