How many numbers including 600 itself round to 600 to the nearest hundred?

Answer 1

this is the answer you require:

[550,650)

i.e all numbers from 550 including 550, till 650 excluding 650.

If you want to know the no. of integers, it is: 100.

If you want to know the no. of real numbers, we can't count them i.e. infinite no. of numbers!

Answer 2

99