A5 digit number has the digits 0, 5, 7, 9, and 0. to the nearest thousand it rounds to 80,000 what is the number?

If the nearest thousand is  80,000, then you know the UNrounded number
must be between  79,500  and  80,499 .

The only way to make a number in that range with the digits
you gave me is
                             79,500 .

Then just do it (lol)