Hi Slopey,
If you're about to take the IMCr theory exam, be careful where the quadrantals change.
They're actually;
000 - 089 ODD
090 - 179 ODD+500
180 - 269 EVEN
270 - 359 EVEN+500
Small difference I know, irrelevant in practice, but might make the difference in a theory exam, if whoever wrote the questions put the magnetic track right on the edge of the quadrant.