Infinitely many. It depends on the accuracy to which the numbers were given prior to rounding.
It is 600000.
600000
0
There are infinitely many such numbers.
Numbers can be rounded to 400 if they fall within the range of 350 to 449. This range includes all numbers from 350.5 to 449.49, as they would round up to 400. Therefore, there are 100 numbers that can be rounded to 400.
600000
It is 600000.
It is 600000.
It is 600000.
It is 600000.
It is 600000.
It is 600000.
It is 600000.
600000
It is 600000.
It is 600000.
600000