5849 rounded to the nearest hundred - The number '8' is located in the hundreds place - Since there is a '4' in the tens place, it's telling number '8' to stay the same 5849 ⇒ 5800
2621 rounded to the nearest hundred - The number '6' is located in the hundreds place - Since there is a number '2' in the tens place, it's telling number '6' to stay the same 2621 ⇒ 2600