800
750
7550 is the smallest number than rounds to 7600 when rounded to the nearest hundred.
0
15,700,000 is already rounded to the nearest hundred thousands.
499
800
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.
The mystery number is 155. When rounded to the nearest hundred, it rounds to 200. The sum of its digits is 1+5+5=11 which is greater than 10, so we must adjust the digit in the hundreds place. When rounded to the nearest ten, 155 rounds to 160, which has digits summing up to 1+6+0=7.