Using the clue
that you have given where this 3-digit number is rounded to the nearest hundred
it rounds down to 900. The digit in the ones places is the fifth odd number
that you count beginning with 1. The sum of the digits is 22. So first we find
out the first digit that is in the ones place. So it said the that it is the 5th
odd number you can count so the odd numbers are 1, 3, 5, 7, & 9. The fifth
odd number is 9. The next clue says that the sum of the digits is 22 so we
subtract 22 from 9 first. 22 – 9 = 13 so right now we need to extract two
digits from 13 that we can use to round up the number to 900 which is 8 and 5. To
round up a number we should consider the number following it. If it is 5 or
more then we should add 1 to the rounded digit. So the unknown number is 859.
