May I just check something please. You can't actually have -3 apples can you? Negative numbers are only relative numbers aren't they? eg. a. You can be 10m west of a particular point b. You can be -20m west of a particular point (which makes you 20m east) Same with temperate. 0 is just a point that is set and any temp below is negative. Is it correct that negative numbers are only relative numbers? Or can negative numbers exist in another form(s)?