It depends on what you are rounding to.
149
450
349
It is 2.85 that rounds to 2.9 to one decimal place
6500000
149
If you are rounding to the nearest ten thousand, anything 25000 and above rounds up. Anything 34999 and below rounds down.
450
349
It is 2.85 that rounds to 2.9 to one decimal place
The least number that rounds to 23,000 when rounding to the nearest THOUSAND would be 22,500. If rounding to the nearest hundred, the least number would be 22, 950. If rounding to the nearest 10, the least number would be 22,995.
2500 is the least whole number that rounds to 3000 because the last significant digit is 5.
75
5555
6500000
8
95