98600
10 of them.
430
16000
Ten integers can be rounded off to 280. An infinite number of numbers can be rounded off to 280.
350 to 449 -- 100 numbers
500
950 to 999 would round to 1000 because 949 and less would round to 900.
100
88500
All numbers can be rounded to the nearest ten.
Ten to the nearest ten.
There are infinitely many such numbers.
If you were told to round two digit numbers to the closest 100, you could round everything from 10-99 to the nearest 100, inclusive of 10 and 99. I.e all two-digit numbers round up to 100. This is because "to the nearest hundred" does not mean "up to 100, or down to zero", since "zero" is not in the "hundred's" catagory. i.e you can only round up to 100.This means you have 89 seperate two-digit number which will round up to 100.
10. 245,246,247,248,249,250,251,252,253,254.
0
283.495231 grams to be exact. If you round that to the nearest hundred you get 300.