Do all measurements have a number?

Answer 1

Yes, all measurements have a magnitude and a unit of measurement. If you don't see a number, the magnitude is understood to be one, unless the units are plural, since that indicates more than one. For example, the sentence "I live miles from here." does not contain a measurement because no number is given or implied. "I live a mile from here." contains the measurement of 1 mile. In the sentence, "The distance is nine.", nine is not a measurement because it has no unit of measurement (meters, miles, etc.). However, units of measurement are optional when the magnitude is zero, unless you're talking about temperature, and the units are not kelvins.