The numbers have a meaning aside from telling the runways apart: they're the azimuth of the runway divided by 10 degrees. So runway 10 has you taking off at a h

The numbers have a meaning aside from telling the runways apart: they're the azimuth of the runway divided by 10 degrees. So runway 10 has you taking off at a heading of 100 degrees, or a little south of east. This matters because you hear the runway numbers over the radio and can picture in your head where the other planes are and where you need to be to line up to land.