7200
The number 693 rounded to the nearest hundred is 700
199
The least number that rounds to 6500 when rounded to the nearest hundred is 6450. When rounding a number to the nearest hundred, you look at the digit in the tens place. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, 6450 rounds up to 6500 when rounded to the nearest hundred.
There is no such number. If you were rounding to the nearest hundred thousand, you would not end up with 157000. 157000 to the nearest hundred thousand is 200000.
7200
8600
3200
7550 is the smallest number than rounds to 7600 when rounded to the nearest hundred.
200
The number 693 rounded to the nearest hundred is 700
199
150
450
0
15,700,000 is already rounded to the nearest hundred thousands.
499