937 to the nearest hundred would be 900, because 37 is less then 50.
The feature located nearest to a continent would likely be its coastline or shoreline.
4.35 rounded to the nearest whole number equals 4.
46.49 can be rounded to 46.5, for its 9 is larger than 4.
35.9 is already at the nearest tenth, so it does not change.
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.